Hello and welcome to LIVE comments from this fourth round clash between fourth seed Andy Murray and Serbian 15th seed Viktor Troicki.

Murray next faces Juan Ignacio Chela.

MURRAY 4-6 4-6 6-3 6-2 7-5 - GAME, SET AND MATCH - Murray seals a brilliant comeback, in the match and this set, with his fifth game in a row! He wins three match points but throws them all away; however Troicki returns out and Murray completes the victory with a sensational backhand as Troicki comes in close!

MURRAY 4-6 4-6 6-3 6-2 6-5 - BREAK - Murray gets to a good drop-shot and replies short - winner! When the boot is on the other foot world number 15 Troicki comes back off the netcord to go 0-30 down. And a wide forehand on the charge hands Murray three break points... the third of them is converted and Murray will serve for the match!

MURRAY 4-6 4-6 6-3 6-2 5-5 - Superb drop from the Scot under pressure at 0-15 down. Murray serves an ace for 40-15 - Troicki gets the umpire out of his seat to inspect the clay - and continues his excellent hitting to seal the necessary hold. The winning point is a defensive one that fortunately drops over the net and out of Troicki's reach.

Murray has won all three of their previous meetings, played in 2008 and 2009. This is their first match on clay. Murray serving to remain in the match.

MURRAY 4-6 4-6 6-3 6-2 4-5 - BREAK BACK - Murray with a tired-looking shot wide to go 0-30 down. However Troicki mis-hits to give him hope... and a brilliant backhand return winner down the line brings him level! Troicki then nervously hits into the net - and a drop-shot falls short to give Murray the break he so craved!

By never I mean until next year, of course.

MURRAY 4-6 4-6 6-3 6-2 3-5 - Solid service game to love to remain in this match. However Troicki will now serve for the set... now or never, Andy.

Murray has to hold, break and hold now to stay in this match.

MURRAY 4-6 4-6 6-3 6-2 2-5 - Murray goes 0-30 up but is pegged back before an utterly unforced error - well wide - gives him one break point. Troicki saves it with a lovely drop-shot with Murray scrambling just short... and soon after he produces a magnificent winner from well behind the baseline and wide to hold! Murray should have come in to the net!

Murray will have to fight from a break down if he is to preserve his unbeaten record against Troicki and reach the last eight. There is no tiebreak in this set, of course.

MURRAY 4-6 4-6 6-3 6-2 2-4 - BREAK - Troicki loses the replayed point and is still incredulous. He then wins two with the crowd's backing... on deuce a wild mis-hit from Murray ends a long rally and gives Troicki his first chance to break. And Murray is forced back and nets from deep! Breakthrough in this match.

Should Murray have told the umpire to let him have the point, given that it is such a crucial moment in the match? Would it have made a difference to the decision? Leave a comment below.

Outrageous! On the first point of the next game Troicki smashes home as Murray defends desperately - but a let is called as the ballboy came running on as the ball fell to him! He is livid - expect to hear more about this.

MURRAY 4-6 4-6 6-3 6-2 2-3 - Love game from Troicki as he settles on his serve. Both players agile and hitting powerfully, excellent players to watch.

In set five so far Murray has had greater success on both his first and second serve, while Troicki has attacked the net 10 times to Murray's three but also committed more errors (five against eight).

MURRAY 4-6 4-6 6-3 6-2 2-2 - The umpire inspects the Murray baseline and finds that Troicki hit long. An ace for 40-0 and a forehand sent wide by the world number 15 seals Murray's second love game of the match.

Both players wearing blue Adidas shirts and white socks and trainers, with the only difference the colour of their shorts. Murray's are white, Troicki's green. /// Simon: "Troicki you can win. Do not let Andy play "dead­ fox". Think and for short balls don't try with­ two hands. Be smart and you will beat him."

MURRAY 4-6 4-6 6-3 6-2 1-2 - Brilliant pass from Murray to save game point and another down the line with the backhand takes him to deuce. Troicki attacks to the corner and is there to get the volley back with Murray floundering, but nets for deuce again. He then gives away break point, saved with a brilliant forehand... Murray could have closed the door on him but stayed back. And the Serb goes on to seal the hold with a serve and volley.

Rafael Nadal is the number one player in the world. At least in name he is, albeit with that record seemingly to fall to Novak Djokovic in the next week.