Luke Littler misses two darts at double top for the set.

But Rob Cross cannot land double 16 - Voltage is missing a load of doubles.

And Littler nails his double! He's ahead in the match, two sets to one!

Image source, Rex Features

Rob Cross hits double 14 to stay in the set but he still needs to recover that break of throw or Luke Littler will be a set to the good.

And a 180 helps the 16-year-old's cause in leg four...

Goodness me, Littler takes out 142 like it's the easiest thing in the world.

He's racing away with this third set.

Luke Littler misses a chance at the bull for an early break in set three.

But Rob Cross is errant on double 14 and seven.

Littler shows some nerves by missing a big single but rescues it with a final-dart double to break Cross' throw again. Advantage 'the Nuke'.

Thanks to Hannah, Ben and Simon for sending this in - priorities whilst having a curry!

Curry, beer and darts - New Year's resolutions going well, you three??

Image source, BBC Sport

I reckon you went a bit early there, Rob mate...

Rob Cross piles on the pressure but 16-year-old Luke Littler doesn't seem to feel pressure.

A 74 finish? Easy. Treble 18, double 10, bang. One set apiece.

What was the worry?

Luke Littler breaks straight back! And now he's throwing for the set to level the match.

Image source, Rex Features

Sky Sports pundit Wayne Mardle:

"Worrying times for Luke Littler and his army of fans.

"First real negative of this World Championship for Littler - he's not happy and he's showing it.

"He's bossed every game but right now he's not the best player on that stage - and he knows it."

Oh, drama.

Rob Cross misses three darts at double - but then Luke Littler, back on 111, has a bounce-out when his arrow seemed destined for the bullseye.

Cross tidies up to break throw with double four.

Rob Cross is not showing any signs of being bothered about facing a teenager in the World Championship semi-finals.

He's just getting the job done. Levels the second set at one leg each with an 11-dart effort - and now he's threatening a break of throw...

Both arrowers exchange 180s in the opening leg of set two.

Rob Cross goes so close to a 167 checkout to break Luke Littler's throw - but the teenager takes out double three, never easy right at the bottom of the board, to hold.

No double despair this time for Voltage.

Luke Littler has a below-average leg at just the wrong time and despite a late 180, it's Cross who claims the first set by coolly taking out double 16.

First to six sets, remember - so very much early doors.

Rob Cross, though, still has the advantage of throwing first in the fifth and decisive leg of the opening set.

Luke Littler shows gumption with a 126 to give himself hope.

And Cross misses two set darts at double. Littler punishes him by taking out 76, finishing on tops.

We shouldn't be surprised, should we? Nothing fazes this lad!

Image source, PA Media

Chance for Rob Cross to break the 16-year-old's throw and take the opening set.

He's down to a finish first after shaking off a single one with two treble 19s.

This is some high-quality stuff. The treble 20 bed is taking a pounding already.

An 11-dart leg, finished with double eight, nudges Cross back ahead.

For the second leg running, Luke Littler leaves 170 to check out.

Treble 20, treble 20... he couldn't? Nope, the dart at bull is well shy.

But he tidies up next visit with double 10 to level the first set.

Luke Littler left himself a maximum 170 finish.

Rob Cross was on double top - misses with his first two darts as the crowd 'oooh'...

But nails the third and celebrates a bit animatedly for an opening leg.