We asked how O'Sullivan would respond? Well, a new hair style and he looks a new player.

Willie Thorne
BBC Sport snooker commentator

"Ronnie is sporting a different haircut from this afternoon. It was spiky this afternoon and now it is a comb over."

We are under way in the final session. How will O'Sullivan respond to falling behind?

Stephen Hendry
Seven-time world champion on BBC TV

"This is what you make a career in snooker for - it does not get any better than this. If you cannot get up for it after that build-up, you should not be playing."

Image source, BBC Sport

World Snooker chairman Barry Hearn (pictured) on Twitter:, external Promised drama at world champs and we are certainly getting it. What a night in prospect.

Philip Pick:, external I'll mostly be watching #bbcsnooker this evening.

Kieran Bestall:, external I dare say BBC2 won't be dusting off a Dads' Army episode to fill time this evening. Its going the distance this one.

Nick Comber:, external Potential 12 frames left. Something tells me I will be catching up on sleep on the way to work tomorrow.

Nick, you are not the only one. There are going to be some tired faces at BBC Towers on Tuesday morning.

Image source, BBC Sport

We are back under way on BBC Two. Live coverage can also be watched by hitting the play button at the top of this page.

Remember, you can also see some of the best action from throughout the tournament by clicking on the highlights tab.

Ben Dirs
BBC Sport at the Crucible

"There have been people calling Selby 'anti-snooker' on certain social media sites, which is to misunderstand what snooker is all about.

"There is more than one way to play the game and many would argue it's more compelling than watching an O'Sullivan procession."

Image source, BBC Sport

Mark Selby walks into the theatre. This is the biggest session of snooker in his life.

I have to admit, I didn't expect Mark Selby to be in the lead now. He looked finished at 8-3 behind yesterday, but there he is, out in front and closing in on the first world title of his career.

Image source, BBC Sport

But there is still a long way to go as he leads Ronnie O'Sullivan 12-11 at the Crucible, needing to reach 18 frames for glory. There are a maximum of 12 frames to be played tonight. We may not finish until the early hours, but we are not going anywhere.

It promises to be an evening of drama, tension and excitement. Thanks for joining us, this should be a lot of fun.

Image source, Getty Images

Earlier today, thousands of Leicester City football fans celebrated promotion to the Premier League as the title-winning side went on an open-top bus parade.

The city could soon be celebrating a championship double as Foxes fan Mark Selby, known as the Jester from Leicester, needs six more frames to win the world title.

The evening session begins at 19:00 BST and we are set for a thrilling conclusion to a gripping final. Mark Selby holds a 12-11 lead, needing six more frames for his first world title.

We are going to quickly grab a break and we will be back with you in an hour. Bye for now.

Edward Williamson:, external If Ronnie wins the first frame in tonight's session, I'd put him as favourite to go on and win. Anything else and it's Selby's.

Emmy Lou:, external Taken the batteries out of the remote so mum can't switch it to Corrie.

Edward:, external What do I do for the next hour and a half waiting for the snooker to come back?

Emmy Lou - Good work, you don't want to miss anything, although you can let her watch the tv for the next hour or so.

Only on four occasions has a player gone into the final session trailing and gone on to win the title.

Shaun Murphy trailed 12-11 in 2005 and won 18-16 against Matthew Stevens and Mark Williams trailed 13-11 in 2000 and won 18-16 also against Stevens.

Image source, Getty Images

Further back, Stephen Hendry was 14-10 behind against Jimmy White (pictured) in 1992 before winning the next eight frames.

Dennis Taylor was losing 13-11 to Steve Davis in that famous 1985 final before winning 18-17 on the final black.

Stephen Hendry
Seven-time world champion on BBC TV

"Ronnie's head is scrambled. Maybe it was the length of that frame. He took it for granted that he would pot it and it was a complete lack of concentration. It was a 100 out of 100 shot that you make every time."

John Parrott
Former world champion on BBC TV

"The greatest player that has ever picked up a cue has missed a pink that any player down the local club would be mortified to miss.

"The fact that O'Sullivan has missed it and gone off is probably in his favour as he won't brood on it out in the arena. I have never seen him miss a shot like that.

"Ronnie should be 12-11 in front but he is not. He has to get fluent, but that's easier said than done against Mark Selby."

A dramatic end to the frame. It looks like it is in O'Sullivan's hands but he misses a simple-looking pink. The frame took 50 minutes and Selby steals it on the black.

The 23rd frame was the longest game of the match so far, lasting 50 minutes and 17 seconds. Selby has scored a total of 1,174 points and O'Sullivan has 1,279 points after 23 frames. Both players have a pot ratio success of 88%, while O'Sullivan's 75% safety success compares with 77% for Selby.

Ronnie O'Sullivan 11-12 Mark Selby (67-70)

Snooker professional Joe Perry on Twitter:, external Ronnie dragged off with two frames still to play, that must be a first!

As Joe says, the afternoon session was meant to have eight frames played, but only six will be possible.

Image source, PA

It looks like the frame will be over as Selby downs a long yellow. But all of his good work is instantly negated as he misses a long green, which was hovering over the pocket.

No action to tell you about, but some important news. This is the last frame of the session. It wasn't meant to be, but it is now. We may have 12 frames in the evening session.

The break will also be handy to give us a chance to get our sleeping bags and tents. We may be here a while.