Yet again Peter Wright essentially tells Luke Humphries that he doesn't think he can take out a big checkout, laying up rather than go for a big finish himself.

It works again with Humphries unable to take out 161 for the second time in the match and Wright returns to get double six to edge ahead.

Image source, PA Media

Luke Humphries is looking frustrated but pulls out a 137 to leave himself tops for the leg.

He takes it at the second attempt and secures the hold with Peter Wright breathing down his neck.

John Part
Former PDC world champion on Sky Sports

Peter Wright is fired up. You can tell by his celebration after winning that leg that it means something to him.

Peter Wright has changed his darts between sets and two 140s in his first three visits suggests it's a decent move.

He goes on to nail a double nine to seal a 15-dart hold.

A reminder to Luke Humphries that Snakebite is going nowhere in this match.

A very decent wage, if you're at the top level.

Luke Humphries would become the first player in PDC history to reach £2m on the two-year Order of Merit system if he clinches back-to-back World Championship titles on 3 January.

Both he and Luke Littler have trousered more than £1m in prize money this year, and they will earn more through sponsorship deals, merchandise and exhibitions.

Luke Humphries was in control of the leg throughout but slows up with the finish line in sight and Peter Wright appears in the rear-view mirror.

Cool Hand lives up to his name though and with having left himself with just one dart at double eight, hits to draw level.

Peter Wright holds his nerve and is going to make Luke Humphries throw for the set.

Humphries started the leg with a 180 but Wright clawed it back and even opted to lay up with his opponent on a 141 finish.

The gamble pays off and White hits double 16 to force a deciding leg.

John Part
Former PDC world champion on Sky Sports

I hope we get a classic match and a game where both are producing their best.

Scores of 140, 131 and 135 for Luke Humphries on his way to a confident hold.

He hits double 16 to complete a 14-darter and move to within a leg of levelling it at one set each.

Image source, Getty Images

Or maybe it won't get Luke Humphries going...

He's nowhere close as Peter Wright hits tops for a simple hold.

That might get Luke Humphries going!

The world champ was miles ahead in the leg so he didn't need to go for the bullseye but he decides to make a statement.

Treble 20, treble 17, bull. Superb.

An average of 97.76 for Peter Wright in that set with Luke Humphries trailing behind on 91.93.

Snakebite was also better on the doubles, hitting three of four compared to Humphries' two of six, so it's simple to see why he came out on top in that one.

Peter Wright comes from a break down to take the opening set.

A brilliant 128 set-up leaves him needing double eight and he makes no mistake.

That's the first set Luke Humphries has dropped in his year's tournament.

Image source, Getty Images

We're going to a deciding leg in this opening set as Luke Humphries starts to find the trebles again.

The doubles aren't coming quite so easily, giving Peter Wright a shot at 132.

But the Scot can't get it and Humphries comes back to hit double four.

Wright has the darts for the fifth leg of the set.

John Part
Former PDC world champion on Sky Sports

I like that Peter Wright always rates himself because he should, he is a world champion and he does turn up here and there and win titles. There is no way you should write yourself off if you have his capabilities.

After that brilliant opening leg, Luke Humphries has not got anywhere close to his best.

Peter Wright is taking advantage and moves two legs to one up in this opening set.

Double eight secures a 15-dart hold.

Peter Wright hits straight back.

With Luke Humphries unable to match his scoring from the opening leg, Snakebite moves well clear with a 180.

He finishes on tops and we're all square.

Luke Humphries has started like he means business.

He goes 137, 135, 134 then takes out 95 for a 12-dart break of throw.

A scratchy dart from Peter Wright and the world champion takes advantage.

Away we go. It's Peter Wright to throw first...