Hello and welcome to LIVE updates of the men's second round match between 16th seed, Gilles Simon and Bulgarian maverick, Grigor Dimitrov.

GAME, SET AND MATCH! - DIMITROV 6-3 7-6 4-6 6-4 SIMON. A brilliant win for Grigor as he ousts the 16th seed in just over three hours of pulsating tennis. The Bulgarian hit back from a break down in the fourth to turn find the form of the first two sets and reach round three. Simon missed a big volley on match point and will be disappointed he didn't take it to a decider after working hard to claw his way back into the contest.

DIMITROV 6-3 7-6 4-6 5-4 SIMON. Grigor back in the boxseat. He claims a solid hold to pile the pressure on Simon. Any slip from the Frenchman now will hand the match to the Bulgarian.

BREAK! - DIMITROV 6-3 7-6 4-6 4-4 SIMON. A big moment in the match. Dimi knocks and then pounds at the door and eventually crashes through to break back at the third time of asking. Dimi playing with more intelligence and patience now, dictating the play and making cunning use of his slice.

DIMITROV 6-3 7-6 4-6 3-4 SIMON. Baby Fed doing enough to stay in with a shout in this fourth set as he ups his game at 30-30 to avoid another break.

DIMITROV 6-3 7-6 4-6 2-4 SIMON. An easy hold for Simon. A fifth-set decider looking increasingly likely.

DIMITROV 6-3 7-6 4-6 2-3 SIMON. Grigor staying in touch but his confidence has clearly taken a bit of a hit.

DIMITROV 6-3 7-6 4-6 1-3 SIMON. Gilles consolidates to 30. Dimi paying the price for a drop in points won on his first serve in the past 30 minutes or so.

BREAK! - DIMITROV 6-3 7-6 4-6 1-2 SIMON. The tide has definitely turned. Simon guides a simple passing shot down the line with Dimi's approach far too weak. The Frenchman has the momentum and a real belief that he can take this into a decider.

DIMITROV 6-3 7-6 4-6 1-1 SIMON. Gilles pushed to deuce by Dimi but the Bulgarian can't work a BP opportunity and the Frenchman levels early in this set.

DIMITROV 6-3 7-6 4-6 1-0 SIMON. Grigor up and running with a decent hold to kick off the fourth set. He seems to have his focus back.

SET! - DIMITROV 6-3 7-6 4-6 SIMON. Gilles is back in it! The 16th seed cuts Dimi's lead to 2-1 with a hold to 15 as he serve out at the second time of asking.

DIMITROV 6-3 7-6 4-5 SIMON. Dimi suddenly has his mojo working again. Simon with food for thought at the changeover. A second chance to serve the set out...

BREAK! - DIMITROV 6-3 7-6 3-5 SIMON. Baby Fed saves one break but it's still Simon's set to lose from here. Disappointing form the Frenchman who lost focus and with it his serve to 15.

BREAK! - DIMITROV 6-3 7-6 2-5 SIMON. That'll surely be the set. Dimi sees a 40-30 lead whittle away into a BP which he loses when he lobs long off the backhand. Simon to serve it out next...

DIMITROV 6-3 7-6 2-4 SIMON. Gilles maintains his advantage as he bids to reduce the arrears.

DIMITROV 6-3 7-6 2-3 SIMON. Massive hold for Dimi. He hits back from triple break point down to deny Simon the double break. It would have effectively given the Frenchman the set. As it stands, Dimi is still in it, but a break behind.

DIMITROV 6-3 7-6 1-3 SIMON. The 16th seed consolidates and has the edge of this third set. Dimi's level has dropped and it's cost him the initiative at this juncture.

BREAK! - DIMITROV 6-3 7-6 1-2 SIMON. A key moment in the match? Dimi misses a golden chance to secure the early break - and now finds himself behind. It's a sloppy service game and Gilles takes full advantage. He's got something to hold onto now and there could well be plenty of tennis left in what has been a fairly close showdown so far.

DIMITROV 6-3 7-6 1-1 SIMON. Big hold for Gilles. Dimi has two bites of the cherry and narrowly misses a shot down the line on the run on the second one. Simon seizes the reprieve and holds from deuce.

DIMITROV 6-3 7-6 1-0 SIMON. Baby Fed looks to keep Gilles' confidence on the floor and rampages to a hold to 15. The scoreboard makes bleak reading for the Frenchman right now.