Wimbledon: Andy Murray, Roger Federer and, Novak Djokovic in action on men's quarter-finals day
The world's top four tennis players - Novak Djokovic, Roger Federer, Andy Murray and Stan Wawrinka - are in action on day nine at Wimbledon as the men's quarter-finals are decided. Follow all the action with our live blog from 12.30pm.
Andy Murray v Vasek Pospisil - Centre Court 1pm
Murray is into his eighth successive Wimbledon quarter-final and takes a 3-0 lead into his match-up with world number 56 Vasek Pospisil, who had never previously got beyond the third round of a major before this Wimbledon.
All their three meetings have come in the last 10 months with the 25-year-old Canadian unable to win a single set.
Pospisil spent more than eight hours on court on Monday, first beating Viktor Troicki in the singles in five sets and then losing a five-setter with Jack Sock against Murray's brother Jamie and John Peers.
"He's played a lot of tennis here which is a positive for him," said Murray.
"But also maybe he's a little bit fatigued. So if that is the case, and I won't bank on that being the case, but if that is the case, I'll try to use that to my advantage."
Pospisil's win over Troicki was his third five-set win in four rounds at the All England Club this year.
Who is Vasek Pospisil?
Nocak Djokovic v Marin Cilic - Centre Court
Novak Djokovic is developing a habit of playing Grand Slam matches over two days. He thinks his latest carried-over contest won't have any effect on him on Wednesday.
The defending champion and No. 1 seed at the All England Club will be competing for a third day in a row when he faces ninth seed and US Open champion Marin Cilic for a semi-finals berth.
That's because Djokovic's 6-7, 6-7, 6-1, 6-4, 7-5 victory over No. 14 Kevin Anderson began on Monday, was suspended because of darkness after four sets, and then resumed Tuesday. The good news for Djokovic is he only needed about 45 minutes to wrap things up, and his match against Cilic is scheduled for second on Centre Court on Wednesday, leaving extra time to rest.
"I wouldn't call it a workout," Djokovic said of his final set against Anderson. "It was good that I played another hour on the match court but it was far, far more difficult than just a simple workout."
Roger Federer v Gilles Simon - Court One at 1pm
Roger Federer is bidding to become the oldest Wimbledon champion and win a record eighth title in 2015.
The Swiss has been virtually untroubled on serve on his way to a 13th Wimbledon quarter-final, just one behind the record of 14 held by Jimmy Connors.
He has yet to drop serve, has faced just two break points in 58 service games and has committed only three double faults.
The last time he dropped serve was in the second set of his opening round win over Philipp Kohlschreiber in Halle -- more than 100 service games ago.
"Maybe the guys are returning terrible," joked Federer.
"Gilles Simon is one of the best return players we have in the game. I would think I'll be tested a lot. So that streak's maybe coming to an end, in my opinion."
Simon, one of three over-30s in the last eight, last made the quarter-finals of a Grand Slam in Australia in 2009. He trails Federer 5-2 in career clashes. After winning their first two meetings in 2008, the Frenchman has lost five in succession although their only two Grand Slam matches - at the 2011 Australian Open and 2013 French Open - went to five sets.
Stan Wawrinka v Richard Gasquet - Court One
French Open champion Wawrinka is in the quarter-finals for the second successive year and is bidding to become just the fifth man to win Roland Garros and Wimbledon in the same year.
Wawrinka, the only quarter-finalist not to have dropped a set at the tournament, faces 21st seed Richard Gasquet with the two men locked at 1-1 in career meetings.
Gasquet won their first clash at the Paris Masters in 2006 with the 30-year-old Swiss gaining revenge at the 2013 French Open when he recovered from two sets to love down to win a fourth round encounter.