Wimbledon day five
World number one Aryna Sabalenka wins to set up fourth-round match with Naomi Osaka; Coco Gauff through in three sets
Novak Djokovic survives scare, Jannik Sinner also through but eighth seed Daniil Medvedev knocked out
GB's defending men's doubles champions Julian Cash and Lloyd Glasspool through to third round
Serena and Venus Williams set to play in women's doubles on Saturday
Like every major sporting event, a lot of work goes on behind the scenes at Wimbledon to ensure a smooth operation for both players, fans at the courts and audiences at home.
A big part of this is organising the daily match schedule, with nearly 700 matches taking place across the two weeks of the tournament.
Lots of you have questions on how it all works - and the All England Club have given us some answers.
Centre Court (from 13:30 BST)
Court One (from 13:00)
Safiullin 6-3 2-2 Fonseca*
Emily Salley
BBC Sport at Wimbledon
Joao Fonseca is clinging on. He keeps gesturing towards his team, looking for answers but they aren't giving him much. They seem worried.
Not too much longer to wait until Wimbledon's two main show courts open for business today.
Fashion icons Novak Djokovic and Naomi Osaka will open up on day five as they bid to reach the fourth round in the men's and women's singles.
Djokovic has been rocking a slightly divisive blazer this week - some of you have love it, one individual messaged in to say he looks like a child playing dress up who's forgotten the trousers...
Osaka paid "love and respect to Japan" with her eye-catching kimono in round one and opted for a lengthy train in round two.
Image source, Getty Images
Image source, Getty ImagesWe'll be seeing Naomi Osaka, Aryna Sabalenka and Rafael Jodar in third-round action later.
They're among the players who have gone for an early practice session at Wimbledon today.
Image source, PA Media
Image source, PA Media
Image source, PA Media*Safiullin 6-3 1-2 Fonseca
Joao Fonseca holds eventually but Roman Safiullin is providing stern opposition for the 19-year-old.
Safiullin 6-3 1-1 Fonseca*
John Lloyd
Former GB Davis Cup captain on BBC Two
Fonseca has to believe this can't keep going like this. He has to keep holding his serve and think Safiullin can't keep this level up.
The level Safiullin is playing at is absolutely incredible.
The Brazilian is rattled. He dominated in his first two matches but he is confused in this one at the moment.
Safiullin 6-3 1-1 Fonseca*
Roman Safiullin is giving Joao Fonseca plenty to think about on the Brazilian's serve.
In a lengthy game which is still ongoing, the teenager has to save a break point against the Russian, who is playing at a level well above his current world ranking of 132.
Been watching the doubles and wondering what the players' hand signals mean? Wonder no more.
Doubles players can use a variety of hand signals to communicate with their playing partner during matches.
Before a serve, the net player on the serving side can indicate to the server how they should play the shot by making a signal behind their back obscured from view of the opposition.
While there are no set rules for what signals are used, there are typically three different ways to indicate the suggested direction of shot, and two to indicate what direction the net player will move in once it has been played.
Bencic 6-4 0-0 Kalinskaya*
An eventful first set containing five breaks of serve eventually goes the way of Belinda Bencic.
The Swiss 11th seed sends down an unreturnable serve on set point and is one set away from becoming the first woman through to the fourth round.
Image source, PA MediaHeliovaara/Patten 7-6 (7-5) 0-0* Kiger/Trhac
There is better news for home fans out on court 18 in the doubles.
Britain's Henry Patten and Finnish partner Harri Heliovaara have taken the opening set against American pair Mac Kiger and Patrik Trhac.
With no breaks of serve, former champions and number one seeds Patten and Heliovaara had to use their experience in the tie-break to take the first set 7-6 (7-5) and keep themselves in the hunt for a second men's doubles title at SW19.
Image source, Getty Images*Bencic 5-4 Kalinskaya
Having fallen 4-1 down with a double break, Anna Kalinskaya got herself back to 4-4 in the first set against Belinda Bencic...
But then the Russian gives up her next service game, ending with a double fault.
Bencic will serve for the first set after the changeover.
Safiullin 6-3 0-0 Fonseca*
Emily Salley
BBC Sport at Wimbledon
Somebody starts up a chant of "FON-SE-CA" as Roman Safiullin walks out to serve for the set, and again when Fonseca brings up his first break point.
The Russian is having none of it. After sending a piercing pass beyond Fonseca, he waves his arms, whipping up some support for himself.
He walks back to his chair with a clenched fist before remembering to apologise to the Brazilian teenager for almost whacking him with that overhead.
Safiullin 6-3 0-0 Fonseca*
Image source, PA MediaQualifier Roman Safiullin gets the first set won at the fifth time of asking and 24th seed Joao Fonseca loses a set for the first time at Wimbledon this year.
*Safiullin 5-3 Fonseca
Joao Fonseca passes Roman Safiullin at the net to earn a break point, but Fonseca can't find the pass for the second consecutive point and instead plants a backhand into the net.
Safiullin covers pretty much every blade of grass on the court to bring up a fourth set point, which he is unable to take - but only because of an outrageous stroke of fortune as Fonseca's shot hits the top of the net and crawls over.
Back to deuce.
*Moutet/Reymond 6-4 0-0 Cash/Glasspool
Defending champions Julian Cash and Lloyd Glasspool are in a little bit of trouble in their second-round match.
The British pair had been keeping parity on serve with French duo Corentin Moutet and Arthur Reymond up until the last game.
Serving to stay in the set, Cash and Glasspool went down 40-0, and though they saved the first, they couldn't keep themselves in it and will now have to come from a set down if they are to carry on the defence of their title.
Image source, Getty Images*Safiullin 5-3 Fonseca
John Lloyd
Former GB Davis Cup captain on BBC Two
As we know, when you see the players on the tour, there is no age when you know it to be when players get the game, to know the game.
Some get it at 17, knowing where to come and be on the court, some don't, and then it just happens. It could be 25 or 26 years old. They suddenly just get the game and get that variety.
Safiullin is having to use all his variety today.
*Safiullin 5-3 Fonseca
Image source, PA MediaJoao Fonseca saves three set points on serve and forces Roman Safiullin to serve it out.
A really strange moment in that game as Fonseca served and then seemed to stop playing - presumably because he thought his serve clipped the net? Anyway, he allowed Safiullin's return to drift past him and lost the point.
But from 0-40 down, he found some form to extend the set by at least one more game.
Safiullin 5-2 Fonseca*
Emily Salley
BBC Sport at Wimbledon
Joao Fonseca hasn't really got going yet.
Roman Safiullin is dictating play from the back of the court, shaking things up with a mix of drop shots and deep groundstrokes, and the 19-year-old is struggling with it.
There are a fair few Fonseca fans on Court Two - easily spotted in Brazilian football shirts - but he hasn't given them much to cheer about so far.
*Safiullin 4-2 Fonseca
Joao Fonseca smacks a powerful backhand into the net on break point and then smacks his racquet into the turf in disappointment.
Roman Safiullin has the advantage in the first set.
