Lengthy safety exchange to begin frame 17.

Both players determined not to give an inch.

John Parrott
1991 world champion on BBC Two

What a competitor - Mark Selby's long game today has been less than 25%, he's presented with a long red in the heat of battle and it's absolutely stunned to perfection straight in the middle of the pocket.

That last frame was typical Selby - top, top-class matchplay.

Defending UK champ Judd Trump has not won a World Snooker Tour event this year.

He needs to win three successive frames to end that drought.

Mark Selby has not won a Triple Crown title in four years - and he hasn't won this tournament in nine years.

He requires one frame to put that stat right.

Steve Davis
Six-time world champion on BBC Two

He dug deep there - you would expect him to, it's one of his strengths.

But he still has to get that last frame and the way it's gone today you wonder if there's another twist in the tale.

An excellent 77, in the circumstances, moves Mark Selby one frame away from a third UK title and a 10th Triple Crown triumph.

Mark Selby is unfortunate that an attempt to break into the remaining pack leaves nothing easy - but, under pressure, he produces a brilliant pot with the rest.

Frame-winning shot.

The pack is positioned such that every time Selby pots a red, he frees up another.

That's helped him get this visit up to 40.

Stephen Hendry
Seven-time world champion on BBC Two

You would think the easy shots he's missed tonight he will be putting 100% focus on every shot - he's had enough lessons.

Selby, though, crunches in a fine red to earn himself another opportunity among the balls...

Right after I typed that Trump was in control tactically, Selby produced a brilliant safety to force an error from the world number one.

But the four-time world champion can only make 11 from it - which is the story of his evening for the most part.

Cagey start to frame 16, Judd Trump in command of the safety battle but Mark Selby fighting fire with fire.

John Parrott
1991 world champion on BBC Two

It is the most remarkable game, snooker, isn't it.

You're 5-0 down, sitting in the chair and looks like he's completely bereft of anything.

All of a sudden come this evening he's started to win - Mark's missing balls all over the place.

This is the first time I think he's got an absolute genuine belief he can win from here - he's been hanging on to his coattails all day but now he's starting to hit the ball properly.

Steve Davis
Six-time world champion on BBC Two

This would be an awful defeat from Mark Selby's perspective, from 5-0.

Neil Robertson
2010 world champion on X

Goodness me. If you’re in Judd’s corner you don’t tell him [referee Olivier Marteel] it was a free ball, and if you’re in Mark’s corner you don’t tell him it’s a free ball. I’m not sure either will be able to avoid it one way or another.

He gets on the red, pots it and the black - 31 ahead with 27 on and a safety shot to follow.

Mark Selby needs a snooker to prevent Judd Trump pulling back within one frame...

Oh and he's left the yellow... Judd gets it but misses the green. Two snookers needed now... oh never mind Trump with an outrageous double on the green and it's 8-7!

Of the two players, while not totally error-free, Judd Trump looks by far the more comfortable and confident right now.

The break up to 40, the lead 16 points - the key shot is black to develop the final red near the cushion...

Mark Selby holds his head in his hands after missing a black off the spot on 25.

That's a bad miss - and he knows it.

Stephen Hendry
Seven-time world champion on BBC Two

Judd has definitely decided to go all-out attack - that red he went for, he just got down and played it, there was no thought about it.

And the fact Judd is being that aggressive means we could be in for an exciting final few frames of this match.