Clayton holdspublished at 19:32 GMT 26 February
Littler 2-5 Clayton
Clayton is on for an 11-darter, but a couple of misses lets Littler back in.
The Nuke can't take advantage, allowing Clayton to win the leg in 12.
Final: Stephen Bunting 6-2 Gian van Veen
Semi-final results: Clayton 0-6 Bunting and Price 5-6 Van Veen
Quarter-final results: Littler 3-6 Clayton, Bunting 6-4 Humphries, Van Gerwen 5-6 Price, Van Veen 6-2 Rock
Rock hits his first Premier League nine-darter - and the first of the season
Alex Brotherton
Littler 2-5 Clayton
Clayton is on for an 11-darter, but a couple of misses lets Littler back in.
The Nuke can't take advantage, allowing Clayton to win the leg in 12.
Littler 2-4 Clayton
Dan Dawson
Commentator on Sky Sports
Image source, PA MediaThat might be the moment that proves decisive.
Littler 2-4 Clayton
Luke Littler misses another three at double 10!
Jonny Clayton takes advantage and breaks straight back.
Littler 2-3 Clayton
Luke Littler has the chance to beak on 167 but can't make it.
Jonny Clayton then misses at double, allowing Littler to break for the first time tonight.
Game on.
Littler 1-3 Clayton
Dan Dawson
Commentator on Sky Sports
Image source, PA MediaI don't think there is any need for Luke Littler to panic.
In his first year, he wasn't in the top four after eight weeks and still topped the league phase.
Littler 1-3 Clayton
Luke Littler is on the board. After his second 180 of the night, he pins double 10 after yet another miss. He's not enjoying himself out there at the moment, but that could be a big hold.
Littler 0-3 Clayton
Jonny Clayton is steaming ahead!
With Littler still in the 200s, Clayton takes an easy 80 checkout to take control of this match.
Littler 0-2 Clayton
Dan Dawson
Commentator on Sky Sports
Image source, PA MediaThat is a monster!
Jonny Clayton did have a habit of raising his game against Michael van Gerwen in the past. He has done it to Littler, most noticeably at the World Masters last year.
Littler 0-2 Clayton
Image source, PA MediaIncredible!
Littler fires in the first 180 of the night, but misses four consecutive attempts at double 10.
Clayton then rattles off a 156 checkout to break and take a two-leg lead.
Littler 0-1 Clayton
Clayton holds with a simple checkout of 56.
Littler 0-0 Clayton
Here we go!
Luke Littler v Jonny Clayton
Wayne Mardle
Former World Matchplay finalist on Sky Sports
Jonny Clayton showed last week that he has the game to beat anyone - and I include Luke Littler in that. It doesn't matter what the other players do it, a lot of it was up to him last week.
He is always at home in the Premier League.
Luke Littler v Jonny Clayton
Laura Turner
Ex-Women's World Championship quarter-finalist on Sky Sports
Jonny Clayton says this is his favourite tournament and it goes to show. His results have been fantastic.
People may have thought he was an underdog but he's proved people wrong. I'm delighted for him.
Littler v Clayton
Here come Jonny Clayton and Luke Littler for the walk-outs.
It's almost showtime!
Littler v Clayton
Image source, PA MediaNight four in Belfast begins with Luke Littler v Jonny Clayton.
Littler suffered a humbling 6-1 semi-final defeat to Clayton on night three in Glasgow, the joint-heaviest defeat in Premier League Darts.
The 19-year-old has only won one of his four matches in this year's competition, and finds himself sixth in the table with four points.
After back-to-back semi-final losses on nights one and two, Clayton went on to win night three and go top of the standings with nine points.
The pair have met on six previous occasions, with Littler taking four wins and Clayton two.
Image source, PA MediaOn night three in Glasgow Luke Littler suffered the joint-heaviest defeat of his Premier League Darts career, losing 6-1 to Jonny Clayton.
But the world champion bounced back a few days later as he won the inaugural Poland Darts.
Littler defeated Gian van Veen 8-4 in the final in Krakow as he hit seven 180s and averaged just over 108.
Van Veen threw the first televised nine-darter of his career, but was unable to stop Littler from claiming a fifth European Tour title and the £35,000 first prize.
"It's been a very good weekend for myself," said Littler.
"I felt really good throughout the tournament. In the first three weeks of the Premier League I've not felt the best, so I definitely needed this one."
Littler begins night four in Belfast with a rematch against Clayton.
Jonny Clayton won the third night of Premier League Darts last week, beating 2026 World Darts Championship runner-up Gian van Veen in the final in Glasgow.
The roadshow will travel across eight countries this year, with tonight's action taking place in Belfast.
The final takes place on Thursday, 28 May at the O2 Arena in London.
Premier League Darts
Joel Bell
BBC Sport NI at SSE Arena
We have chickens in attendance!
Conor, Joe and Patrick are at the SSE this evening for night four of the Premier League Darts.
Image source, BBC SportThe crowd inside Belfast's SSE Arena erupts into a frenzy when Josh Rock comes up on the big screen.
The Northern Irishman isn't playing until the fourth quarter-final, but the crowd are already well behind him.