Jonny Clayton is now throwing for a place in the Premier League final.

Dylan Mohammad-Smart
BBC Sport Wales at The O2, London

You can never write Jonny Clayton off!

He's one leg away from a place in the final.

Image source, Getty Images

Not as strong from Jonny Clayton in this leg, who trails Humphries throughout. But he turns it around!

He eventually gets down to 58, but Humphries has a chance to take out 58 himself.

Humphries gets the 18, but goes inside on tops and inside on double 10!

18, then inside on tops from Clayton. But he finds the double. Clayton is two legs clear.

Two 180s in this leg from Jonny Clayton! That was electric.

He finds a 10-darter to pull ahead.

Clayton leads for the second time in this match.

Stuart Pyke
Commentator on Sky Sports

Jonny Clayton should have been 7-2 down but remarkably he's level at 7-7. He's shown real courage and class and skill.

Ian Mitchelmore
BBC Sport Wales at The O2, London

It's a night of comebacks here at The O2!

Unbelievable resilience shown from Clayton here.

Dylan Mohammad-Smart
BBC Sport Wales at The O2, London

A break of throw and we're level!

Here we go!.

Luke Humphries gets down to 135, but only ends up reducing it to 51 remaining.

Clayton responds by getting down to 76 and has a chance after Humphries misses double 16 before going inside.

Clayton then checks out double eight. We have a game on our hands.

Charlotte Coates
BBC Sport at The O2, London

Much like his Welsh mate Gerwyn Price, Jonny Clayton is mounting quite the comeback here.

The advantage is with Luke Humphries but those cheeks are starting to get redder now...

Ian Mitchelmore
BBC Sport Wales at The O2, London

The first semi-final went to a last-leg decider.

Will this one as well?

Clayton is doing everything in his power to keeps his hopes of reaching the final alive.

Jonny Clayton goes inside on double 12 and misses double six, but Luke Humphries is too far back to cause him much trouble.

Clayton gets the double on his next visit to reduce the deficit again.

Mark Webster
Former BDO world champion on Sky Sports

There's a shake of the head from Jonny Clayton and an element of relief for Luke Humphries.

That could be a key leg.

Ian Mitchelmore
BBC Sport Wales at The O2, London

Clayton shakes his head there, and he knows that's a huge chance missed.

Humphries in control now.

Image source, PA Media

More missed doubles from Jonny Clayton.

Luke Humphries misses double five so it gives Clayton a chance with 100 left, but his attempt at a double-double fails with his final dart going inside.

Humphries busts, but Clayton then ends up missing double five himself. Humphries takes advantage and wraps up the leg.

Mark Webster
Former BDO world champion on Sky Sports

All of a sudden this semi-final has got a completely different outlook.

Jonny Clayton has 170 left. He gets the first treble, but then misses it with his second dart and ends up leaving 30.

Luke Humphries isn't down to a finish, though, so there is no pressure.

Clayton splits it with 14 and double eight to wrap up the leg.

Mark Webster
Former BDO world champion on Sky Sports

Jonny Clayton has hung in there. He was forceful in that 10th leg.

There is plenty to ponder for Luke Humphries.

Dylan Mohammad-Smart
BBC Sport Wales at The O2, London

Two huge legs on the bounce from Jonny Clayton has kept him right in this game going into the halfway stage.

Time for the break. Will Jonny Clayton find a way to turn this around after the restart?