Well, he is still in charge of the frame, but he cannot wrap it up in one visit.

O'Sullivan makes a break of 58, his best of the match so far, but runs out of options and has to play safe, sending the brown ball to the side cushion. There is still 75 left on the table.

O'Sullivan in charge of frame three.

John Parrott
1991 world champion on BBC Two

The funny thing is Ronnie really shouldn't be in this final after what happened against Liang Wenbo in the first round when Liang should have won.

And Joe Perry last night came from 5-2 down and potted a brown along the cushion that was superb to win his semi-final.

And now is the time for Liang to look away as here is that miss on the black that cost the Chinese player a win over O'Sullivan in the first round. 

We said Ronnie O'Sullivan is aiming to win the Masters for a seventh time and these are the men to have won the tournament on more than one occasion.

Players are English unless stated.

6 - Ronnie O'Sullivan, Stephen Hendry (Scotland)

3 - Mark Selby, Cliff Thorburn (Canada), Steve Davis, Paul Hunter

2 - Alex Higgins (Northern Ireland), John Higgins (Scotland), Mark Williams (Wales)

Image source, PA

Tina: I wish @joegentlemanjoe, external could hear my applause from my sickbed, really wish I was at Ally Pally! Come on Joe, he's beatable!

James Felton: Normally want Ronnie O'Sullivan to win, but Joe Perry is such a gentlemen and deserves the title immensely. May the best man win.

Ok, this was not in the script. Perry moves 2-0 ahead in the Masters final. He benefited from an O'Sullivan mistake in the opener, and the Rocket brought Perry to the table when he fouled in the second.

Perry does the rest with a break of 53, his second half-century break in two frames.

Image source, Getty Images

So what's happening in frame two? Well, O'Sullivan's missed black brought Perry to the table and he made 32, before missing a shot at a red, although his cueing was hampered as he did so.

Every time O'Sullivan gets a chance there is a loud cheer from the crowd. Some will be cheering on Perry, but O'Sullivan remains the most popular player in the sport with the fans.

Take a look back at some of the best shots of the 2017 Masters, including Ronnie O'Sullivan's incredible positional shot and Joe Perry's amazing escape from a snooker.

Now you've seen the options, you can vote on your favourite shot from our 10 options. 

Desktop users will find the vote at the top right of the page, while mobile users will need to press the vote tab.

The vote will be closed at 19:00 GMT and the results announced at the start of the second session.

Ronnie is not too happy at the moment. During the opening frame he had a chat with referee Paul Collier, apparently unhappy at noise coming from the practice table.

Which, of course leads us to ask just who is on the practice table right now?

O'Sullivan has also just missed a black in frame two to darken his mood even further.

John Parrott
1991 world champion on BBC Two

Joe Perry's break of 72 in that frame will have settled him down and he'll also take heart from seeing Ronnie miss. Joe is a very good player, he's ranked higher than Ronnie, but he needs to get in front. 

If you get a bad start you're in trouble because Ronnie is the greatest frontrunner we've ever seen.

Steve Davis
Six-time world champion on BBC Two

The bookmakers make Ronnie a strong favourite and think this will be one-sided but Joe's a quality, experienced player and has been on the ropes in matches before so knows how to withstand what's being thrown at him today. Sometimes it's a lot easier to play as the underdog.

We said he needed a good start, and that is just what Perry has made.

O'Sullivan's first mistake is punished as Perry compiles a break of 72 to take an early lead.

If you had put some money on him at 80-1 at the start of the tournament you may be getting your hopes up.

Image source, Getty Images

Perry's early error does not come back to haunt him as O'Sullivan can only make a break of 24 before he too misses one he would normally expect to bag.

Shamoon Hafez
BBC Sport at Alexandra Palace

A fantastic reception for both players, especially for Joe Perry who is into his first Triple Crown event final.

Defending champion Ronnie O'Sullivan is the hot favourite as he bids for a record seventh Masters title.

I spotted him back stage before he got his call into the arena and The Rocket was looking extremely relaxed with his entourage of support.

As always we want your thoughts on the action as well as finding out what your best moments of the tournament have been.

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The nerves kicking in early for Perry?

He makes seven in the opening frame before missing what looks a routine red to give O'Sullivan an early chance in frame one.

Surely if Perry is going to have another chance, he needs to move into an early lead and apply some pressure.

And we are off. The match is the best of 19 frames, so the first to 10, played out over two sessions.

This is the biggest match of Joe Perry's life. How will he get on?

Watch five great shots as defending champion Ronnie O'Sullivan reaches his 12th Masters final with a 6-4 win over Marco Fu at Alexandra Palace in London.  

Watch five great shots as Joe Perry produces a stunning comeback from 5-2 down to beat Barry Hawkins 6-5 and reach the Masters final.