Back after the break, Humphries starts off this session with a 180 and a 140.

After nine darts, he only needs 58 to hold his throw.

He goes 18 and tops to win the 21st in 11 darts. Superb.

The averages are closing in again the more this match goes on.

Humphries is still over 100 on 101.98, but Van Gerwen is narrowing, now up to 97.23.

Michael van Gerwen will head into the next leg after the break with a bit of confidence after winning the 20th leg of this match.

He takes out 70 on double eight and this match is now 11-9.

Image source, Mark Robinson/PDC

A tight 19th leg, with Van Gerwen really stepping up his scoring in the last few legs.

Humphries does regain his three-leg advantage with a finish on double 18, but this game does feel closer now.

A thoroughly entertaining start to this leg as both men exchange 180s on Van Gerwen's throw.

Humphries gets a first go at a finish, but goes trebleless searching for 164.

Van Gerwen goes low on tops when attempting to finish and Humphries responds by missing out on double 14.

One dart into double 10 holds throw for Van Gerwen.

The focus for Luke Humphries at this stage, with a two-leg lead, has to be making the most of the legs where he throws first.

Another maximum for him helps him to do so, with six darts at a finish.

Teeing up 40 after the first three, his next visit clinches the 17th leg on double 10.

Mighty Mike comes back from a short break with the darts on his throw.

Setting up 32, he only needs one dart to cut Humphries' lead to two.

Humphries' average remains just into three figures at 100.31, while Van Gerwen is closing in now at 95.04

What a view at an iconic darts venue.

Image source, Mark Robinson/PDC

Luke Humphries looks to finish on 80 to hold throw, but falls short on tops.

Michael van Gerwen could have halved Humphries' lead with an 84 finish, but goes wide on double six.

Humphries eventually finishes on double five in a checkout of 20 to regain his three-leg advantage.

Brilliant darts from Luke Humphries as he targets another break of throw to go four legs clear.

Throwing a fifth maximum of the match, Humphries has a chance at 81 but misses on double 13.

Unlucky number 13 strikes its luck on Humphries, with a poor dart there from him blocking off a finish on double four.

Van Gerwen returns to finish on double eight and hold his throw.

Now, Van Gerwen gets a bounce out against him when looking to land a hat-trick of treble 19s.

Humphries gets three darts to take out 40, which he finishes off on double five to go 8-5 up.

In back-to-back legs, world number one Humphries has suffered with a couple of bounce outs, much to his confusion and dismay.

Despite that, Humphries gets a go at 141 and finishes it off superbly to break throw. Excellent composure.

Michael van Gerwen makes the most of a bounce out for Luke Humphries, giving MVG six darts on a finish.

A 102 set-up leaves him with 65, then going 25, 20 and finishing on double 10 to halve the deficit.

We're back after the latest break.

Humphries throws first, having won four of the five legs in the second session.

Like at the last break, Luke Humphries' average is more than 10 higher than Michael van Gerwen's, with 102.3 playing 92.03 at present.

On double percentages, the gap is now much tighter. Humphries is at 35.3%, with Van Gerwen ahead on 40%.

Back on his throw, Michael van Gerwen looks for the big finish, narrowly missing bull for a 127 checkout.

He returns to finish on 24, bringing the score back to 6-4 before another break.

That was a poor session for Van Gerwen, but he goes into the next break having won the 10th leg of the match.

Luke Humphries has a chance to win a fourth leg in a row and his fourth since the break but misses doubles 20 and 10.

Van Gerwen is unable to checkout on 88 after missing bull and Humphries returns to finish on double five to go three legs clear.

Image source, Mark Robinson/PDC

Losing the lead could have been the best thing to happen for Michael van Gerwen.

He starts the eighth leg by landing five of his first six darts into treble 20.

After struggling to take out 81, Van Gerwen leaves himself three darts to take out 32, but does not convert.

Humphries is back to break on 74, which finishes off on bull for another break of throw.

Since that break at the end of the fifth leg, Michael van Gerwen has really struggled to put the pressure on, with a succession of trebleless visits in the last two legs.

Humphries re-takes the lead with one dart at tops for a 13-dart leg.