Hello and welcome to live updates of the French Open round four clash between reigning champion, Stan Wawrinka and Serbian 22nd seed, Viktor Troicki. The players are due on Chatrier shortly.

Selfie!

GAME, SET AND MATCH! - WAWRINKA 7-6 6-7 6-3 6-2 TROICKI. Stan completes the job to march into the last eight. He had a second set wobble but recovered to keep his defence on track. People will talk about it being Djokovic's year but don't rule this guy out. With that backhand he's a match for anyone in a one-off clash.

WAWRINKA 7-6 6-7 6-3 5-2 TROICKI. It's a hold to love for Viktor. Wawrinka seemed to be already gearig himself up to serve it out. He has the chance next...

WAWRINKA 7-6 6-7 6-3 5-1 TROICKI. What an escape from Wawrinka. The Swiss survives three BPs, producing a stunning crosscourt backhand on the run to save one before somehow taking the game from the battling Troicki. It's hard lines on the Serb. The champ is one game away.

BREAK! - WAWRINKA 7-6 6-7 6-3 4-1 TROICKI. This match is all-but over. Wawrinka thumps a crosscourt forehand winner way beyond the lagging Troicki to snare the double break. The end is nigh.

PHOTO: Wawrinka's knock around with a ballboy from earlier. Great stuff!

WAWRINKA 7-6 6-7 6-3 3-1 TROICKI. The Swiss whistles through another simple hold as he looks to wrap this up in the next 20 minutes or so. Can Troicki find something from somewhere to defy the inevitable?

WAWRINKA 7-6 6-7 6-3 2-1 TROICKI. A fine recovery from Viktor who remains competitive despite his injury issue. He hits back from 0-30 to stay in with a small shout and get on the board.

WAWRINKA 7-6 6-7 6-3 2-0 TROICKI. Stanimal consolidates to 30.

BREAK! - WAWRINKA 7-6 6-7 6-3 1-0 TROICKI. It's looking bleak for Viktor. He's given a really good account of himself, but with the injury problem an Stan hitting better form he's undoubtedly up against it. The Swiss breaks to 15 and can see that finish line even at this early stage in the fourth.

SET! - WAWRINKA 7-6 6-7 6-3 TROICKI. Stan is back on track! The Swiss sees it out to 30, sealing it on his second set point. It's been much more assured in the past 20-30 minutes from the champion.

WAWRINKA 7-6 6-7 5-2 TROICKI. Stan pumps the fist. He drops two points on serve but does enough to move within one game of a 2-1 lead. It's not vintage but he's getting the job done...

WAWRINKA 7-6 6-7 4-2 TROICKI. An important game for Troicki. The injury niggle and the shift in momentum towards Wawrinka means he needs to stay focused and wait for his chances. He's still well in this match and needs to be ready if Wawrinka dips again.

Troicki having treatment on his hip. To pass the time Wawrinka has a knock about with a ball boy. Lovely touch from the Swiss!

WAWRINKA 7-6 6-7 4-1 TROICKI. Stan is pushed to deuce but conjures up ace number 13 to consolidate in emphatic fashion.

BREAK! - WAWRINKA 7-6 6-7 3-1 TROICKI. The backhand comes good and leaves Troicki rooted to the spot. The Swiss snatches the initiative in the third. Can he build on it?