Josh Rock fires in a maximum. Jonny Clayton immediately responds with a 180 of his own.

Rock nearly takes out 68 to win it, but misses his dart at double 16. Clayton requires 60, but misses two at tops.

Rock then mises another at double 16, and one at double eight, before finally pinning the double.

No lack of trebleless visits from either player in the first leg.

It is Josh Rock who ends up being first down to a finish, getting to 116. He sets up a finish on tops but misses.

Clayton takes out 80 to win the leg.

Game on!

Who will meet Luke Littler in the final in Rotterdam?

Jonny Clayton takes on Josh Rock next.

That result means Luke Humphries ends another week sitting outside the play-off places.

He is three points off Michael van Gerwen in fourth.

A game of real quality - and you'd expect nothing less when these two meet.

Luke Littler's average of 100.85 was marginally lower than Luke Humphries' 103.

Humphries was also exceptional on the doubles with a checkout percentage of 71.43% compared to Littler's 46.15% - which is still pretty good.

It was the relentlessness of Littler's finishing in the middle of that match that proved decisive as he reeled off four legs on the spin.

Image source, Getty Images

Another brilliant match between these two but Luke Littler comes out on top again!

Superb leg from the world champion, his switching to treble 19 proving so valuable on a number of occasions.

It comes down to the double 10, Littler hits it and has a chance for a fourth nightly win.

Rod Studd
Commentator on Sky Sports

Luke Humphries has got back up off the canvas.

Luke Humphries has come all the way back to level!

We're going to have another last-leg decider.

Luke Littler to throw first...

Wayne Mardle
Former World Matchplay finalist on Sky Sports

Luke Littler thought it was his throw then. Is his head in the shed?

Well, well, well.

We're not done yet. Luke Humphries finally misses a dart at double but Luke Littler can't punish him.

Double six and we're back on throw...

Luke Humphries stops the rot and extends the match.

He remains perfect on the outer ring, Luke Littler just hasn't given him the chances most of the time.

Wayne Mardle
Former World Matchplay finalist on Sky Sports

Luke Humphries has been completely overrun for the past four legs and I did not see that happening.

Another 180 for Luke Littler and he is closing in on the final.

Double six seals the leg and it's a long way back for Luke Humphries now.

Luke Humphries is starting to look like he's regained some momentum but it doesn't matter because Luke Littler is on the charge.

A 180 to start and he races on to break by hitting double top.

Wayne Mardle
Former World Matchplay finalist on Sky Sports

The interesting dynamic for me here is that Luke Humphries has come right off the boil. That didn't look like it was coming.

Luke Littler is enjoying himself.

From saying he wouldn't react to the crowd before the start of the night, he's going for the opposite approach now.

He's playing up to it and the whole thing seems to have knocked Luke Humphries off his stride.

Double five puts Littler back in front.

Wayne Mardle
Former World Matchplay finalist on Sky Sports

Image source, Getty Images

He said before the Gerwyn Price game that he wouldn't react but he has there and they don't like it.

I think he's had enough of not reacting. He's strutting now and he's really giving it now.

When he has this swagger he's hard to deal with.

'Calm down' is the signal from Luke Littler after hitting tops to break back - and the crowd aren't happy.

Whistles for him and then cheers as he fails to find a treble on his first visit of the next leg.

Magnificent from Luke Humphries.

He's had his troubles finishing this year but not here - he goes treble 19, treble 19, bullseye to take out 164.

A break of throw for the defending champion.