Serena Williams recovered from a set down to beat Bethanie Mattek-Sands in the third round of the US Open. Photograph: Reuters

Serena Williams and Marin Cilic both survived third round scares on Friday to keep their U.S. Open title defences on track but there was no escape for(...)

Serena Williams of the U.S. hits a return to Kiki Bertens of the Netherlands during their second round match at the U.S. Open Championships tennis tournament in New York. Adrees Latif/Reuters

If this were a fight, it might have been called off before a blow had been landed. But Kiki Bertens, a smiling, 23-year-old Dutch qualifier who looked(...)

Serena Williams celebrates after winning her match against Victoria Azarenka  at  Wimbledon. Photograph: Toby Melville/Reuters

Two of the most iconic figures of the game took a rattling yesterday, one verbal, the other physical. Both Serena Williams and Maria Sharapova advance(...)

Serena Williams is  now just three grand slams short of Steffi Graf’s record after she beat Maria Shrapova in straight sets to win her sixth Australian Open title. (Photo by Clive Brunskill/Getty Images)

Serena Williams extended her winning streak against Maria Sharapova to 16 matches to claim a 19th grand slam title in the Australian Open on Saturday.(...)

Serena Williams (right) shakes hands with Dominika Cibulkova after winning their women’s singles quarter-final in Melbourne yesterday. Photograph: Reuters/Athit Perawongmetha

Serena Williams moved one match closer to making more tennis history at the Australian Open, but her bigger struggle might be just getting out of bed(...)

Stan Wawrinka  celebrates after defeating Kei Nishikori to progress to the semi-finals of the Australian Open. (Photograph: REUTERS/Carlos Barria)

Men’s champion Stan Wawrinka avenged a tough defeat to Kei Nishikori at last year’s U.S. Open while an ill Serena Williams remained on track for her (...)

Venus Williams  hits a return against  Agnieszka Radwanska during their  match at the  Australian Open in Melbourne. Photograph:  Mal Fairclough/AFP/Getty Images

Venus Williams will face a player she inspired to take up tennis after reaching her first Grand Slam quarter-final since 2010 in the Australian Open. (...)

Novak Djokovic stretches to hit a backhand return during his match against    Gilles Muller  at  the Australian Open in  Melbourne. Photograph:  Lukas Coch/EPA

Novak Djokovic ensured seven of the top eight seeds reached the quarter-finals of the Australian Open after overcoming Luxembourg’s Gilles Muller in M(...)

Madison Keys of the USA plays a forehand shot in her third-round match against Petra Kvitova of the Czech Republic at the Australian Open in Melbourne. Photograph: Michael Dodge/Getty Images

American teenager Madison Keys toppled fourth seed Petra Kvitova 6-4 7-5 in an impressive display of clean hitting to reach the fourth round of the Au(...)

Andy Murray  reacts during his US Open match against  Russia’s Andrey Kuznetsov. Photograph: Eduardo Munoz/Reuters

Andy Murray had another frustrating afternoon on the Louis Armstrong Stadium court but did enough to defeat Andrey Kuznetsov and reach the fourth roun(...)