Highlights from the fourth day of the Barclays ATP World Tour Finals at London's O2 Arena...
10 semi-finals for Federer
Poor David Ferrer. The Spaniard entered his 14th encounter against Roger Federer without a win to his name, in fact, without a set to his name when the two have faced off indoors. And Thursday was no different, try as he might, the Spaniard battling against an arguably below-par Federer, but to no avail. Federer triumphed 6-4, 7-6(5) to reach his 10th ATP season-ending semi-final, joining Pete Sampras (10) and Ivan Lendl (12) as the only players to reach the last four that many times.
The Swiss also extended his match-winning streak at the World Tour Finals to 12 with his 70th win of the season. But that could come to an end in his third and final round robin match on Saturday against Juan Martin Del Potro, who beat Federer in the Basle final two weeks ago.
Del Potro on the board
Del Potro was disappointed not to have done more in his opening match against David Ferrer on Tuesday. But he made up for it with a thumping 6-0, 6-4 win over an admittedly under the weather Janko Tipsarevic.
"I'm glad to beat Janko tonight," Del Potro said. "I play much better than my first match here [against Ferrer]. [A] win in two sets gives me a chance to go to the next [match]. I know if I want to beat Roger, I should play much better than today and my first match."
The Argentine gave the 17,000-strong crowd something extra to cheer for as he hit with compatriot Sergio Aguero, of Manchester City and Argentina football fame, on the O2's court.
Bumper day for Bryans
Not only did Bob and Mike Bryan register their first win of the World Tour Finals with a 7-5, 6-4 over Aisam-ul-Haq Qureshi and Jean Julien Rojer in 76 minutes, they went home with some silverware too - the year-end ATP World Tour Doubles No.1 ranking, and the Fans' Favourite award.
The Bryans have a 26-14 record together in 11 appearances at the Barclays ATP World Tour Finals. They have won a team record 82 titles and they are the only team in the Open Era (since 1968) to win at least five trophies for 11 years in a row.
Australian Open champs into semis
Third seeds Leander Paes and Radek Stepanek qualified for the semi-finals after beating the enthusiastic Spanish duo Marcel Granollers and Marc Lopez 7-5, 6-4 in one hour and 32 minutes.
Stat of the day
Roger Federer has a 102-1 lifetime record against opponents aged 30 and over. His only loss came against 31-year-old Andre Agassi in Miami in March 2002.
Coming up on Friday
Max Mirnyi & Daniel Nestor v Mahesh Bhupathi & Rohan Bopanna
Both of these experienced duos have just one win a piece so a spot in the semis is on the line.
Novak Djokovic v Tomas Berdych
There are all sorts of permutations to the way Novak Djokovic can advance to the semi-finals on Friday, but the easiest way is simply to beat Tomas Berdych, and beat him resoundingly. Given that he's only lost once to the big-serving Czech, at Wimbledon in 2010, their 11th meeting is likely to go the Serb's way.
Robert Lindstedt & Horia Tecau v Jonathan Marray & Frederik Nielsen
This could be the most-anticipated doubles clash of all, as the Wimbledon champions take on the Wimbledon runners-up. Robert Lindstedt, who was handed his third Wimbledon final defeat by the wild card pair, was so upset that he smashed up all his rackets, so there is no doubt he willl be out for revenge. Either way though, Marray and Nielsen are already through to the semi-finals.
Andy Murray v Jo-Wilfried Tsonga
The British media have their calculators at the ready to work out if Murray can make it into the last four. But the simplest way of assuring his place, although not as assured as Djokovic, will be to beat Tsonga, and beat him as emphatically as possible. Murray has only lost to the Frenchman once, at the Australian Open in 2008, so there is hope yet.
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