Very tight and tense in frame 26. Selby has a shake of the head and doesn't know what to do. He trails 25-24, but the reds are all in a dangerous position so a loose safety could cost him the frame.

BBC Sport's Frank Keogh on Twitter:, external Bolton, Blackburn, Wigan, Wolves, Birmingham & Blackpool were all in the Premier League the last time Ronnie O'Sullivan lost at the Crucible (27/4/11).

Image source, Getty Images

From Neil Robertson's long-range double to Ding Junhui's perfect safety shot, there have been some super shots in the 2014 World Snooker Championship.

You can watch a collection of top pots, including a pinball-style fluke from Judd Trump, on the BBC Sport website.

Ryan Hewitt:, external Could this go to a 35th frame? Shades of 1985 about it.

Jamie Mercer:, external Can see this going all the way which, although exciting, would be frustrating as I have to be up early tomorrow.

Amit Varsani:, external Finally a match where Ronnie has to graft for it... greatest in snooker? Will be in a year or two.

Image source, BBC Sport

BBC Radio 5 live's George Riley posts a picture on Twitter, external of when Ronnie O'Sullivan entered the arena at the start of the evening session.

If Mark Selby wins the final he will go to number one in the new world rankings.

However, if Ronnie O'Sullivan is successful he will go to number three in the rankings and Ding Junhui will become the first ever Asian world number one snooker player.

We have asked six-time world champion Steve Davis your Twitter questions. Here is another of the answers from the Nugget.

Image source, BBC Sport

Steve asks: "Steve Davis at the top of your game v Ronnie on fire v Hendry in his prime…who wins?"

Steve Davis: "Ronnie, because in my opinion everything in a competitive sport improves so every generation is better than the generation before it."

Selby is back in front. He has inched back ahead, and now leads by 13-12.

Ronnie O'Sullivan 12-13 Mark Selby (24-67)

Sports presenter Tim Lovejoy:, external Who's going to win this snooker? Ronnie has flattened his hair and means business.

MP Michael Dugher:, external Busy bank hol but feet up now. Kids in bed. A chilli on the stove. Cold beer in the fridge. Snooker on the box. Footy shortly. That'll do.

St Helens rugby league prop Kyle Amor:, external Can't believe I'm writing this but think I'm going to stick with the snooker over football tonight. Too close to call.

Image source, PA

Not for the first time in the final, Selby misses what would be a frame-winning pot. This time his attempt on the pink rattles in the jaws of the pocket but will not drop. He still leads 66-24 in the frame though.

An excellent long pot from Selby helps him to a 47-24 lead against O'Sullivan. The man from Essex comes to the table with the cueball resting in behind the brown ball.

Ex-darts world champion Eric Bristow on Twitter:, external Just been to bookies had more money on Ronnie - only one winner. Also had a double on Ronnie and Liverpool. No brainer.

Liverpool play Crystal Palace at Selhurst Park tonight and can go top of Premier League with a victory.

Live text commentary of that match is here. Have two computers, laptops, tablets or phones? One screen for snooker, one screen for football. Perfect.

James Froud:, external I know Ronnie O'Sullivan is one of the greats but Mark Selby hasn't received any recognition. His comeback was immense.

Xander Fletcher:, external World snooker final tonight and I have a finals exam tomorrow..tricky decision..not. Snooker!

You will have about 10 minutes to cram in some revision in the mid-session interval later on, Xander.

Mark Selby is back at the table in the 25th frame. Selby has only ever been in the world championship final once before, losing 18-13 to John Higgins in 2007.

The 24th frame was the quickest of the match so far, lasting just seven minutes and 38 seconds.

"It is the second year in a row we have seen a century break in the first game of the final session after Barry Hawkins's 127 last year."

Ben Dirs
BBC Sport at the Crucible

"O'Sullivan, a continuity man's nightmare, returns after the break with a new hairstyle. And a century break in seven minutes.

"Much talk in the press room of a potential midnight finish. This next frame is a bit more to Selby's liking - they might be right."

Image source, Getty Images

Ronnie O'Sullivan is aiming for his sixth world title. Throughout the evening session we will be looking back at his previous victories. First up, 2001.

O'Sullivan won his first world title as a 25-year-old in 2001. Defending champion Mark Williams was knocked out in the second round with a 13-12 defeat to Joe Swail. O'Sullivan went on to win the final against John Higgins, 18-14, the closest final the Rocket has been involved in.

Image source, Stephen Fry

Comedian Stephen Fry on Twitter:, external The ham in a snooker royalty sandwich.

Stephen is joined by former world champions Steve Davis (left) and Ken Doherty

Ken Doherty
Former world champion on BBC TV

"Ronnie would have been a lot more nervous this evening. The interval came at the right time for him and there is no better time to score a century. He looked to be absolutely buzzing."

Selby's lead only lasted for one frame. O'Sullivan takes the opening frame of the evening session to make the score 12-12. He makes a 100 break, Selby only had one shot and we are back level.

Ronnie O'Sullivan 12-12 Mark Selby (100-0, O'Sullivan 100 break)