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Whether you were at the game or following from elsewhere, we want to know what you learned.
Have your say on Sunderland's performance
What did you make of Brighton's display?
Come back on Monday for a selection of your replies
Sunderland XI: Ellborg, Geertruida, Ballard, Alderete, Hume, Sadiki, Xhaka, Rigg, Diarra, Talbi, Brobbey.
Subs: Moore, Cirkin, Mayenda, O'Nien, Isidor, H Jones, J Jones, JM Jones, Whittaker.
Brighton XI: Verbruggen, Wieffer, Van Hecke, Dunk, Kadioglu, Milner, Gross, Gomez, Hinshelwood, Minteh, Welbeck.
Subs: Steele, March, Rutter, Boscagli, Ayari, De Cuyper, O'Riley, Veltman, Howell.
There are five games in the Premier League on Saturday and BBC Sport will bring you every moment.
Burnley v Bournemouth - listen on BBC Radio 5 Sports Extra
Sunderland v Brighton - listen on BBC Radio 5 Sports Extra 2
Arsenal v Everton (17:30) - listen on BBC Radio 5 Live
Chelsea v Newcastle (17:30) - listen on BBC Radio 5 Sports Extra
West Ham v Man City (20:00)
Kick-offs 15:00 unless stated
Follow all of the action and reaction here
You can also listen to today's 5 Live Premier League commentaries on most smart speakers. Just say "ask BBC Sounds to play Sunderland v Brighton" or "ask BBC Sounds to play Arsenal v Everton", for instance.
Find out more about how to listen to Premier League football on BBC Sounds
Sophie Brown
BBC Sport journalist
Brighton make the long trip to Sunderland, where they have lost on their five visits. Meanwhile, the Black Cats will be happy to return their focus to the league after last week's shock FA Cup defeat by Port Vale.
Domestic knockout competitions have been a sorry story this season for Sunderland, who have been dumped out of both the Carabao Cup and FA Cup by League One sides. However, fans can still take comfort from their top-flight status – and hope that it could even result in qualifying for a European competition next season.
The Black Cats' win over Leeds in their most recent Premier League game took them to the 'magical' 40-point mark. While mathematically not yet safe, relegation is very unlikely - only three teams have ever gone down at the end of a 38-game Premier League season with 40 or more points.
Sunderland were actually one of those sides in 1996-97, when they were relegated with 40 points. But the last occasion it happened was back in 2002-03 when West Ham went down with 42 points.
It is an impressive achievement by Sunderland, given all three promoted sides have been relegated in both of the past two seasons. Furthermore, the Black Cats finished 24 points behind the Championship's top two last season and required stoppage-time winners in both their play-off semi-final and final to reach the top flight.
The club weren't afraid of overhauling their squad - they recruited 15 players over the summer, spending more than £160m, a record for a Premier League promoted club - and the gamble appears to have paid off.
Since 2009-10, only two promoted teams have earned more points at this stage of the Premier League season. But the job isn't quite done, and head coach Regis le Bris admitted that his side "didn't show enough" in their abject performance against League One bottom side Port Vale last weekend.
And after only losing five of their opening 24 matches of the season, the Black Cats have since lost five of their past nine.
Brighton remain three points short of the '40' mark – it's comfortably their lowest points tally and position at this stage for the season in four years, although given the tightness in the middle of the table, even at 14th they are still nearer the European spots than the relegation zone.
Their current relatively low standing is mainly the result of a mid-season lull, during which they won just one of 13 league games. Things have improved in recent weeks, which have included two wins and three narrow 1-0 defeats, including a somewhat unlucky loss to Arsenal 10 days ago.
In that game, Brighton didn't take their chances, and lack of goals has become a familiar story – after scoring 28 in their first nine league games, the Seagulls have scored just eight in their past nine.
But at least they haven't been conceding either – only leaders Arsenal have conceded fewer than Brighton's nine in the past 10 league games.
All of which doesn't necessarily make happy reading for neutrals, with Brighton's past 15 Premier League matches having included 30 goals, fewer than any other side in this period.
I was really disappointed by Sunderland's defeat at Port Vale in the FA Cup, and not just because that was another prediction I got wrong.
It felt like an absolute gimme for Regis le Bris' side, and I wanted to see them have a decent cup run.
They have still had a great season and they have already hit 40 points so they will be absolutely fine in terms of staying up.
But they will still want to finish the season strongly, and that means they need to get their home form going again - after staying unbeaten there for so long, they have lost the past two at the Stadium of Light.
Brighton hit a sticky patch too around the turn of the year but they had picked up again with wins over Brentford and Nottingham Forest, before narrowly losing out to Arsenal last time out.
The Seagulls can reel Sunderland in and move above them in the table with a win but I don't think they will get one. Instead, I am going for a draw.
Sutton's prediction: 1-1
Sunderland plan to transform the exterior plaza of the Roker End of the Stadium of Light to become a Legends' Way for next season.
"It will be a permanent tribute to players, supporters and shared memories," says BBC Radio Newcastle commentator Nick Barnes.
There will be a new statue of ex-Black Cats keeper Jimmy Montgomery – and the 'Welcome to Sunderland' sign from Roker Park will be installed on the side of the Stadium of Light.
Listen to BBC Radio Newcastle's discussion here or hit play below
Sunderland boss Regis le Bris has been speaking to the media before Saturday's Premier League game against Brighton at The Stadium of Light (15:00 GMT).
Here are the key lines from his news conference:
Brian Brobbey and Dennis Cirkin have both "trained fully this week" and "might be available" to face the Seagulls.
Le Bris added that this weekend's game will come too soon for Robin Roefs, Nordi Mukiele and Reinildo but the trio are "in a good place and progressing well", while the club are expecting Bertrand Traore to be out for "six to eight weeks minimum".
Reflecting on last weekend's FA Cup exit to League One Port Vale: "Disappointing. A bit embarrassing to be fair. We lacked desire and fighting spirit. It's sad because we missed a big opportunity to go forward. It's now time to find consistency and show the levels we displayed at Bournemouth and Leeds. We know we're capable of it. This weekend is a good opportunity to show our core strengths."
Was he surprised by the performance?: "Yes, because in that context we have to win. It wasn't a good feeling, we tried to find explanations and to challenge them and support them as well. It is a learning curve. I'd like to include myself and the coaching staff in that. We failed. Ups and downs are part of the learning curve. It's not a positive moment but we have to be better for it."
Le Bris paid tribute to Enzo Le Fe, who made his 50th Black Cats appearance last weekend:" I'm really pleased. After Lorient he had good spells but difficult moments in Rennes and Roma, so when you reach 24 or 25 you never know if it stays potential or become a great player. I felt he could be a great player. He made a strong decision to come to the Championship, showed good quality but got an injury. This season, the hardest and most demanding league in the world, to show his consistency and play in different positions really means something."
On the challenge posed by Brighton: "They are a well-established team in the Premier League now. They have a really clear identity, are really good on the ball, have a lot of mobility. Their counter-press is outstanding. It's a modern style of play that is really efficient and really interesting."
On staying hungry after reaching the 40 point mark: "We have to keep the same mindset. Every game is the opportunity to win three points. Against every team in this league is tough. Everyone can beat everyone in this league. We have to keep going because we don't know if 40 points will be enough, and we want to keep being ambitious."
You can listen to Le Bris on BBC Sounds
Follow all of Thursday's Premier League news conferences and the rest of the day's football news
Listen to live commentary of Sunderland v Brighton on BBC Radio 5 Live Sports Extra 2 and BBC Sounds
Got a question about Sunderland? Get in touch here and we'll put it to our experts
Image source, Rex FeaturesFormer Sunderland chairman Bob Murray will be inducted into the club's hall of fame at half-time during Saturday's game against Brighton.
He is the club's longest serving chairman, having been in charge from 1986 to 2006.
A club statement read: "A lifelong supporter of Sunderland AFC, Sir Bob's vision and leadership helped shape the club's modern identity.
"Most notably, he played a pivotal role in delivering the Stadium of Light, transforming the former Wearmouth Colliery site into a world-class home for the club after Sunderland outgrew its historic home at Roker Park.
"Beyond the stadium itself, Sir Bob also championed investment in the club's long-term future through the creation of the Academy of Light and later the Beacon of Light – the home of the Foundation of Light, which supports thousands of people across Sunderland, South Tyneside and County Durham every year."
Ex-Sunderland striker Marco Gabbiadini, speaking on BBC Radio Newcastle, said: "I think I was his first signing. Bob's a good friend.
"He delivered the stadium, built at a fraction of the cost of similar ones. The Academy of Light is a spectacular place. We used to train up there, it was a field. We had to cancel training once because it was so windy and wet.
"To turn that into what it is now, the foresight is incredible. A great guy. He's one of the most humble people you could meet."
Murray also had a role in the development of the home stadium and training centre of English football.
"Wembley and St George's Park were going nowhere, they'd run out of money and anyone to drive them forward," said Gabbiadini.
"Bob, it was like calling for Superman. He came in and helped those get delivered."
Listen to BBC Radio Newcastle's discussion on Murray here or hit play below
Gavin Henderson
Fan writer
Image source, Getty ImagesThey say that a week is a long time in football, and after the week Sunderland have had, I'd have to agree with that saying!
After battling against some poor officiating to get a draw away at Bournemouth, we followed that up with a brilliant win away at Leeds on Tuesday. But, we came crashing back down to earth with a bang after losing away at Port Vale in the FA Cup on Sunday - a timely reminder of how harsh and unforgiving cup football can be.
There have been plenty of excuses made - the state of the pitch and the fact Sunderland are missing a ton of players through injury and suspension being the main two - but for me, that doesn't and shouldn't matter. Regardless of all of that, Sunderland had more than enough quality out on the pitch at Vale Park to be able to overcome a team who are rooted to the bottom of League One.
The attitude and application from our players was poor, and Port Vale won simply because they wanted it more than we did. And, to me, that's unforgivable.
The carrot dangling in front of us was a potential trip to Wembley if we could get through this game and then the quarter-finals, but that didn't seem to phase us. Instead, we seemed unprepared for what we were up against and showed none of the fight or battle that was on display in our previous two games on the road in the Premier League.
I get that we're stretched at the minute, but it wasn't good enough. Make no mistake though, Port Vale were good value for their win and fully deserve to be going through to the next round.
For Sunderland's players and coaching team, we have to see a response against Brighton at the weekend. We're back at the Stadium of Light for a 3pm kick off, and it's been a while since we could say that, but the fans will be expecting to see all the traits that we've become familiar with over recent years with this team - heart, grit, determination; a doggedness that gives us the edge over good teams because we simply want it more than they do. It wasn't there on Sunday, disappointingly, but we know they've got it in them, and a victory over Brighton would get us back on track ahead of the derby against The Visitors on the following weekend.
Typical Sunderland - just as you think things are going perfectly, you're given a reminder that you can't always get your own way in this game!
Find more from Gavin Henderson at Roker Report, external
Adam Millington
BBC Sport journalist
Image source, Getty ImagesSunday's shock 1-0 win over Premier League side Sunderland sent Port Vale into the FA Cup quarter-finals for only the second time in their history.
Sunderland put out a strong team, making just two changes from the side that beat Leeds in the Premier League in midweek.
However, they "never really got going" against their League One opponents, according to ex-Black Cats midfielder Andy Reid, struggling to make the most of their chances after they eventually began to create more in the second half.
"We know Sunderland are going to be in the Premier League next year so this is in a lot of ways a free hit where they could go and really concentrate on it [the FA Cup]," Reid said on BBC Radio 5 Live.
"They put out as strong a team as possible and they just never really got going today in terms of any quality."
Glenn Murray added that Sunderland were "wasteful" and "could never get into that flow" that they display in the Premier League.
"Although they picked a strong side, they missed not having Granit Xhaka in the middle to control the tempo of play from the start," Murray said.
"This season Sunderland are used to teams coming at them and leaving space in behind, meaning they can play on the counter. But you can't sit back away to a League One side as a Premier League club - the onus is on you to create."
We asked for your views on Sunday's FA Cup fifth round defeat at League One Port Vale.
Here are some of your comments:
David: Embarrassing. A huge opportunity missed with only ourselves to blame. Disappointing individual performances all over the pitch with only really Angulo, Ballard and Alderete coming out with any credit. I would have actually thrown both the latter two up front much earlier. Which speaks volumes. We really need to address our lack of goal threat sooner rather than later with a minimum of two new strikers and a goalscoring wide man needed over the summer.
Keith: A performance without spirit or plan. They tried to play as if it was a bowling green and showed little of their usual energy. Angulo was the only one trying to play for the conditions. Port vale had a plan and played to it. They deserved their win.
Stephen: As other Premier League teams have discovered, lower tier teams play a different game and are often difficult to score against. However our experience of being a lower tier team for many seasons should have given us the key of how to unlock this opposition and yet we were clueless.
Pete: Absolutely shocking. Can't blame the pitch, as some people are, we were just poor. Allowed them to dictate the game, they had a plan and stuck to it. Not sure what we had - formation with one striker? Ruthless team talk after that debacle. I usually stick up for the players but today I can't find it in me.
Colin: Absolute joke - arrogance at it's finest. Turned up thinking that's all was needed to do, got exactly what we deserved, and we deserve all the stick and criticism we get.
Richard: Probably our worst performance of the season. No desire, no passion and second best all afternoon. Well done to Port Vale - deserved the win. The Sunderland team need to take a long hard look at themselves - and maybe reimburse thevtravelling fans who paid to watch an abject performance.
Image source, Getty ImagesThe Telegraph's Luke Edwards says Sunderland were "not up for it" during Sunday's disappointing FA Cup fifth round exit at the hands of League One Port Vale.
Vale are 11 points adrift of safety at the bottom of the third tier, but battled fiercely against the Black Cats ranked 57 places above in the pyramid to make it to the FA Cup quarter-finals for the first time since 1954.
"I do think Sunderland turned up and weren't as focused as they should have been," Edwards told BBC Radio 5 Live's Football Daily podcast.
"I've watched them play a lot of times this season and the energy levels and intensity were not the same.
"When they are at it they are physical, intense, relentless and they were not that. They tried to play a slow game. I'm sure they didn't turn up there expecting to win, but I don't think they were as laser-focused and up for it as they should have been.
"That's why FA Cup shocks happen. It was Port Vale's cup final and Sunderland were not up for it.
"Port Vale have had a difficult season but none of what had gone before mattered. They should have been tired and exhausted after that brilliant win over Bristol City a few days earlier, but they had more energy than Sunderland."
Listen to the full episode on BBC Sounds
Pundits Ellen White and Glenn Murray join host Kelly Somers to bring you the action and talking points from Saturday and Sunday's FA Cup ties.
And listen back to full match commentaries on BBC Sounds:
Image source, Getty ImagesSunderland boss Regis Le Bris, speaking to BBC Sport: "Congratulations to our opponent, they played with intensity and patience.
"It was about the fighting spirit and they seized their opportunity. We had chances but it wasn't enough to win the game.
"We had enough [players to win the game but we didn't show enough.
"We thought so [it was a chance to go deep into the competition]. They [the players] are young. Sometimes you do not realise what an opportunity it is."
Did you know?
Sunderland have been eliminated from five of their last six FA Cup ties against sides from the third tier of English football or lower, as many as in their previous 18 beforehand.
After only losing five of their opening 24 matches of the season in all competitions (W8 D11), the Black Cats have since lost five of their last nine (W3 D1).
Hear from Black Cats captian Luke O'Nien on BBC Sounds
Hear more from Le Bris below or on BBC Sounds
Whether you were at the game or following from elsewhere, we want to know what you learned.
Get in touch with your views here
Come back to this page on Monday to find a selection of your replies
There are three changes for Port Vale from the side who beat Bristol City 1-0 after 120 minutes in midweek.
Tyler Magloire, Jordan Shipley and Martin Sherif are replaced by Dajaune Brown, Funso Ojo and Kyle John.
Port Vale XI: Gauci, C. Hall, Gabriel, Brown, Archer, Walters, Ojo, Gordon, Waine, John, Humphreys.
Subs: Amos, Headley, Shipley, Campbell, Ward, G. Hall, Magloire, Gray, Hernandez.
Regis Le Bris makes two changes to the Sunderland side who beat Leeds 1-0 on Tuesday.
Chris Rigg and Chemsdine Talbi come in for Trai Hume and Noah Sadiki.
Sunderland XI: Ellborg, O'Nien, Ballard, Alderete, Geertruida, Rigg, Le Fee, Diarra, Talbi, Angulo, Mayenda.
Subs: Moore, J. Jones, Xhaka, Whittaker, Aleksic, H. Jones, Isidor, Geragusian, Abdullahi.
There are three fifth-round ties in the FA Cup on Sunday and BBC Sport will bring you every moment.
Fulham v Southampton (12:00) - BBC Radio 5 Sports Extra 2 & BBC Radio Solent
Port Vale v Sunderland (13:30) - BBC Radio 5 Live, BBC Radio Stoke & BBC Radio Newcastle
Leeds v Norwich (16:30) - BBC Radio 5 Live, BBC Radio Leeds & BBC Radio Norfolk
Kick-off times GMT
Follow all of the action and reaction here
You can also listen to today's 5 Live commentaries on most smart speakers. Just say "ask BBC Sounds to play Fulham v Southampton" or "ask BBC Sounds to play Leeds v Norwich", for instance.
Find out more about how to listen to football on BBC Sounds
How to follow the FA Cup fifth round on the BBC
