Serena Williams will face sister Venus on the quarter-finals of the US Open at Flushing Meadows. Photograph: Reuters

Serena Williams’ historic pursuit of the calendar grand slam was transformed into an emotionally supercharged family affair the world No1 could certai(...)

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 (...)

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(...)

John Isner returns a serve against Andy Murray, from Great Britain, during a match at the Western & Southern Open tennis tournament, in Mason, Ohio. Photograph: Al Behrman/AP

John Isner stands an imposing 6ft 10in, has served nearly 6000 aces in his career, and, at Wimbledon in 2010, defeated Nicholas Mahut in the longest m(...)

Maria Sharapova 
of Russia (2ndL) holds her trophy as she poses
with her coach Sven Groeneveld (left) and the rest of the team after her French Open victory over Simona Halep at Roland Garros.
Maria Sharapova of Russia (2ndL) holds her trophy as she poses with her coach Sven Groeneveld (L) and team in the dressing room after winning the women’s singles final match against Simona Halep of Romania during the French Open tennis tournament at the Roland Garros stadium in Paris June 7, 2014. REUTERS/Sindy Thomas/FFT/Pool (FRANCE - Tags: SPORT TENNIS)

Wimbledon remains the leafy place where Maria Sharapova became a star. It has been 10 years since Sharapova, then the 13th seed, upset former Wimbledo(...)

Marion Bartoli of France trains on a practise court at the Wimbledon.   Photograph: Toby Melville/Reuters

Marion Bartoli completes her journey from rock bottom to the most prestigious match in women’s tennis tomorrow when she steps out on Centre Court to (...)