Littler 6-2 Smith
Image source, PA MediaAn incredibly scrappy leg - where both players missed almost double-figure chances at doubles.
But it's Luke Littler who eventually lands double two to take it.
He's four legs from the final!
Littler 5-2 Smith
Glen Durrant
Former Premier League champion on Sky Sports
Fine margins. Interesting that Smith is not watching any of Littler's darts.
Littler 5-2 Smith
Luke Littler has two darts at double 14 for a double break.
He misses both - but comes back after Smith misses bull.
However, Littler misses three more darts. But Smith can't punish him.
Littler 5-2 Smith
Glen Durrant
Former Premier League champion on Sky Sports
Image source, PA MediaSmith needed an Usyk round nine but doesn't get the treble.
Littler 5-2 Smith
Michael Smith, though, is struggling to make many inroads into the Littler throw.
He's not had a dart at a break yet - and Littler lands double top to continue that pattern with Smith waiting on a finish after his best leg against throw.
Littler 4-2 Smith
Glen Durrant
Former Premier League champion on Sky Sports
As much as we are waxing lyrical about Littler, Michael Smith is doing just fine. He's got the experience and a lot can change in this game.
Littler 4-2 Smith
Glen Durrant
Former Premier League champion on Sky Sports
The arena is absolutely amazing, I was beginning to panic but boy, did it fill up. The atmosphere is electric.
Littler 4-2 Smith
What has Michael Smith got in response?
Well, he digs out a crucial hold of throw with a clutch dart at double four.
Littler 4-1 Smith
Image source, PA MediaYou might be right, Stevie.
Littler is proving deadly on doubles so far, landing double 15 to stretch his lead and consolidate that break.
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I’m picking Luke Littler to win.
Stevie J, Portsmouth
Littler 3-1 Smith
Glen Durrant
Former Premier League champion on Sky Sports
This fascination of Luke Littler, he's going to have ups and downs in his career, but he means business. His mannerisms walking to and from the board and boy, he means business tonight.
Littler 3-1 Smith
Luke Littler two darts off a nine-darter!
After seven treble visits, the eighth arrow is errant to the despair of the 14,000 in attendance.
But he brushes off that disappointment to break throw.
Littler 2-1 Smith
Glen Durrant
Former Premier League champion on Sky Sports
A great touch there from Michael Smith who congratulates Luke Littler.
Littler 2-1 Smith
Oh here we go.
Michael Smith piles on the pressure on the Littler throw with the first 180 of the match.
The teenager responds by taking out 144 with treble 20, treble 20, double 12.
Littler 1-1 Smith
Glen Durrant
Former Premier League champion on Sky Sports
The crowd are loving this pace and I think we are going to see this throughout the night, the pace will suit all four of them.
Littler 1-1 Smith
Glen Durrant
Former Premier League champion on Sky Sports
When Littler means business and is up for the challenge, which is what I see tonight, it is going to take something special to beat him.
Littler 1-1 Smith
First to 10 legs in these semi-finals, remember.
Smith responds to Littler taking out 68 in the opening leg by nailing 67 with tops.
Littler 1-0 Smith
Glen Durrant
Former Premier League champion on Sky Sports
When these two have played in seven meetings so far this season, the player who threw first has gone on to win.
Littler 1-0 Smith
The only advantage Luke Littler gets from finishing top of the regular-season table is that he gets to throw first in this semi-final.
And he makes it count with a nice treble 16, double 10 combination finish to checkout 68.
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Would like a Luke Littler win tonight but my prediction is Humphries. Going to be tight one though!
Matt, West London