Andy Murray will either be trying to exploit new dad Novak Djokovic's sleepless nights or head off Gael Monfils and a patriotic wave of French support in the next round.

You will be able to get across it either way on this website via the 5 live sports extra's coverage or our own live text commentary.

See you there.

After Stan Wawrinka's defeat to Kevin Anderson earlier today and with his place in the World Tour Finals secure, Andy Murray can start looking up in the rankings rather than down.

Murray could dislodge Wawrinka in the worlds's top four if he outperforms the Swiss at the O2. Doing so would ensure him a far smoother route to the latter stages of the Grand Slams in 2015.

Andy Murray speaking to Sky Sports: "It is nice to make the World Tour Finals. It is a great event, it is fun to finish the year in London in front of packed houses.

"Since the French Open I think I have played well to be honest. I have lost to some of the best players to have ever played the game, I didn't play my best against Grigor at Wimbledon, but I have got some good wins at the end of this season.

"The top four would be nice. If I can keep winning and moving up the rankings that would be great, but I would have to play great tennis for the next few months."

Andy Murray does the de rigueur thing of signing the proffered camera lens as he sits on his stool.

The Scot adds a little note to his scribble. It looks like it says "Bad Year". Maybe a fair assessment by his stratospheric standards, but 2015 could be better judging by this strong finish to the season.

Image source, Getty Images

Hugely impressive from Andy Murray. That was brutal, big business-like tennis. Victory wrapped up in an hour and nine minutes and if he brings that game to the World Tour Finals, there is no reason why he can't win it for the first time.

Andy Murray into the net to pull back to 15-15.

A big serve out wide pulls Grigor Dimitrov out of shape for 30-15.

Is that a hint of British nerves though? Murray prods tentatively and Dimitrov swats away a commanding forehand for 30-30.

But Dimitrov dumps a forehand long to offer up match point.

The Bulgarian has a second serve to look at, but can't exploit the netted first. He flays a forehand into the net and that is job done.

O2 sign-makers get to work. You have a name to put up in lights.

Grigor Dimitrov with a horrible framed forehand that he would not have been seen dead with on Centre Court in July gives Andy Murray 15-30.

It looks like the end is nigh.

But the Bulgarian summons up some fight to keep the match and his season alive, pressing forward to good effect.

The match is on Murray's racquet next though.

A seventh ace of the match ripped down the centre from Andy Murray is as accurate as it is timely. Delivered at 30-30, it is pronounced good by a Hawk-Eye post-mortem and Grigor Dimitrov, having sensed an opening, balloons long on the next point.

A game away now.

Image source, AFP

Grigor Dimitrov, battered and bruised, manages to keep his hand on the table.

He needs some of Andy Murray's pet gremlins to make a cameo appearance now. The second set is usually when they get a runaround, but the Scot seems to have got them firmly under lock and key.

Ross McD:, external Clinical, ruthless, and absolutely thorough. Andy Murray is finally back.

Andrew Neill:, external Cool, calm and efficient. Keep this up and Slam no.3 may not be beyond the realms of possibility next year for Andy!!

Andy, you are really spoiling us.

A ding-donging rally emerges as Grigor Dimitrov lobs the kitchen sink, breadmaker, blender and washing machine at his opponent. Murray is equal to all of the Bulgarian's effort though, retrieving from uncharted corners of the court with backhand slice.

Then comes the change-up as Dimitrov plants the ball into mid-court and is slapped around the chops with a stinging forehand. Murray into the net for a routine volley and 40-0.

The umpire rewards him with a pernickety time violation, but Murray is not to be denied. A hold to love and the match and an O2 spot are two games away.

Grigor Dimitrov is having to hunt out clean winners, nipping the rallies in the bud to keep Murray out of the equation.

As soon as they go beyond the opening few shots everything is starting to go pear-shaped for Dimitrov in the face of Murray's brilliant ball-striking.

A combination of brave hitting and a slice of luck - a final shot snagging on the wire to deceive Murray - sees the Bulgarian make a belated impression of the second-set scoreboard.

Image source, AFP

This match does not need Lady Luck helping Andy Murray, but she adds a shove in the Scot's direction as a dribbly netcord drops his way.

A service hold to love. Grigor Dimitrov puffs his cheeks and looks up to coach Roger Rasheed in the stands.

Time to get the voodoo doll out Rog, nothing else seems to be working.

Russell Fuller
BBC tennis correspondent on Radio 5 live sports extra

"The wheels are coming off for Dimitrov. Andy Murray is closing in on the World Tour Finals and also revenge for Wimbledon. We've not had any drama from him this week - he normally provides some."

Oh my. Andy Murray moves to 0-30 with a cascading cross-court lob over an advancing Grigor Dimitrov that is millimetre perfect.

That is a shot that is so indecent that the replays come with post-watershed restrictions.

Grigor Dimitrov at his best would be stretched.

At the moment he is some way short of that and another cuff long from the world number 11 hands Murray a break at the first opportunity in the second set.

Andy Murray is on the rampage, tossing down thunderbolt serves and uprooting Grigor Dimitrov from whatever central position he takes on the court.

His third ace of the match closes the game to love.

Murray serving first in the second set, Dimitrov playing scoreboard catch-up and any Murray break potentially decisive.

This one might be over quicker than expected.

I've probably just jinxed it.

Just a brilliant stand-and-deliver barrage of winners from Andy Murray as he smotes a forehand winner and follows it up with an arrowed backhand return onto the same spot in the next rally for 15-40 and two set points.

Murray pushes his luck a little on the first, attempting an angle that Clark Kent might dismiss as a bit ambitious.

Murray's form is unsettling Grigor Dimitrov though. He attempts to keep the serve out of Murray's reach and only succeeds in burying it into the net twice in quick succession.

The set is done, 33 minutes on the clock.

Andy Murray is still hitting the ball as clean as a whistle, the ball just streaking off the strings and cutting down the time for Grigor Dimitrov to react.

The Scot is a game away from the opening set.

Grigor Dimitrov is fighting a rearguard action at the moment. The Bulgarian ducks, dives and dodges his way to another service game, avoiding the best Murray can throw at him to keep his cards on the table in the opening set.

Dimitrov won the first set of their Wimbledon quarter-final in 25 minutes. That is not going to happen this time.