Well, that's all from us on a dramatic night four at Alexandra Palace.

You can read a round-up of Wonderful Wednesday from Frank Keogh.

Afternoon Session (12:30)

First round

Chris Landman v Lok Yin Lee

Callan Rydz v Romeo Grbavac

Martin Lukeman v Nitin Kumar

Second round

Gabriel Clemens v Robert Owen

Evening Session (19:00)

First round

Nick Kenny v Stowe Buntz

Mensur Suljovic v Matt Campbell

Scott Williams v Niko Springer

Second round

Michael Smith v Kevin Doets

First round

Jim Williams 2-3 Paolo Nebrida

Madars Razma 3-1 Christian Kist

Ricky Evans 3-2 Gordon Mathers

Second round

Nathan Aspinall 3-1 Leonard Gates

Leonard Gates has the throw for the final leg of this fourth set and takes command of it.

Gates is down to a finish, but Nathan Aspinall's 180 gives the American a metaphorical tap on the shoulder, with Gates then missing out on 135.

Aspinall tees up double 18, with Gates doing the same on double 20.

On his second dart, The Asp takes it.

That was a battle, but Aspinall got there and is into the third round after Christmas.

One leg away from the third round, a 180 from Nathan Aspinall gets things off to a perfect start.

Leonard Gates puts some pressure on, going 140, 100, 140 to start his leg.

Gates gets the chance to finish first on 121. He needs a bull finish, but again, only finds 25.

Aspinall does not take his 143 chance, but Gates misses doubles eight and four.

On 79, Aspinall goes 19, 20 and then low on double 20, only for the last dart to bounce out.

Gates pins double two to break throw, surviving once more.

Leonard Gates starts the leg on his throw with a 180 to put early pressure on Nathan Aspinall.

Despite that, The Asp gets down to a finishing chance before Gates on 167.

A 139 sets up double 14 for Aspinall, but Gates, left needing bull for a 124 out, puts his final dart in the 25.

Aspinall misses double 14 but takes out double seven to move within a leg of the third round.

Even with his struggles to release the dart at times, Nathan Aspinall is still finding a way to score trebles and win legs.

Back-to-back two-treble visits set up double four, which Aspinall would come to, had Leonard Gates not found bull to take out 88.

Nathan Aspinall averaged 94.62 in set three, his best set.

Leonard Gates, averaging almost 87, also just had his best set of the night.

Aspinall almost takes the lead in the fourth set on 147, but he misses double 18 by a whisker.

The Asp comes back to it, taking it out first time.

Even with the jump in confidence, do not write off Leonard Gates just yet.

He goes 180, 139 to set up 98 to take the set to a deciding leg.

Nathan Aspinall has 170 for the set. He picks out the two treble 20s perfectly, but can only find 25 with the third dart.

Aspinall returns on 25, but misses doubles eight and four.

A 14 from Gates sets up two darts at double 20, but he misses both.

With two more darts at double four, Aspinall takes the set.

After 12 legs, Nathan Aspinall finds his first 180 of the night, much to his own relief.

Needing 47 for the leg, he misses double 16, but takes double eight for a 12-dart leg.

A huge roar, he will be very relieved by the finish.

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.

Leonard Gates starts this leg with the darts and makes it count to level the match.

Needing 64, he goes treble eight, double 20 to cancel out Aspinall's advantage in the set.

On his throw, a 97 finish will do Nathan Aspinall the world of good.

He needed that, pinning double 20.

It's been a low-scoring affair so far, with both Nathan Aspinall and Leonard Gates averaging less than 85 each.

Both could do with a kick on in this set.

In a second set decider, both Leonard Gates and Nathan Aspinall start slowly, exchanging low-scoring visits.

On 154, Gates sets up double eight, with Aspinall needing 107.

Three singles from Aspinall give Gates three darts for the set, but he misses all three across doubles eight and four.

Aspinall gets two darts at double 20, but also misses both.

Down at double two, Gates also misses there, but wins the set on his second dart in the double one madhouse.

A good start to the leg against the throw for Leonard Gates.

He goes 180, 100, 139 to leave 82 after nine darts.

A 26 is not his best move, but Nathan Aspinall is a mile back in the leg.

Gates returns to pin double 20 with his second attempt and level the set in 15 darts.

That break of throw from Leonard Gates has kicked on his confidence as he finds his first 180 of the evening.

A poor 42 does bring him to a finish, but Nathan Aspinall is hot on his heels.

Gates needs 96 and scores 56 for a double 20 shootout.

Aspinall goes first and in one dart, finds tops.

Leonard Gates gets the chance for a break of his own.

With six darts at 138, trebles on five and one only bring him down to 101.

Gates' next visit bring that him to 32 with Aspinall needing 140.

Two treble 20s from Aspinall are hit well, but he narrowly misses double 10.

Gates picks out double 16 to break back.

Nathan Aspinall is having the odd throw where he is needing to re set-up or adjust his positioning as he fights through the challenges he has faced in recent times.

He remains ahead of Leonard Gates, but the American gets a first at a finish.

On 148, Gates sets up 50, but may not get back for it.

Aspinall returns on 79. Singles on 19 and 20 set up double 20, which Aspinall takes, after a re-grip.

A battling display from The Asp.

James Gregg
BBC Radio 5 Live reporter at Alexandra Palace

Christian Kist told me he’s disappointed he lost the match after hitting a nine-darter earlier, but with the £60,000 bonus he’ll get from the sponsors, he’ll be off on his holidays.

The man might be gutted he’s come up against Luke Littler last year and lost tonight after a perfect leg but he’s forever a part of history