Novak Djokovic serves the ball during the Italian Open. Photo: Claudio Onorati/EPA

  When Roger Federer said on the eve of his 39th match against Novak Djokovic, “He’s not Rafa Nadal”, he must have suspected his hubris wo(...)

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 (...)

Eugenie Bouchard of Canada hits a return against Irina-Camelia Begu of Romania during  their women’s singles match at the  Australian Open  in Melbourne. Photograph: Mal Fairclough/AFP/Getty Images

Perfectionist Eugenie Bouchard revealed she had given herself a stern talking to after surviving a second-set collapse to book her place in the quarte(...)

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(...)

 Serena Williams reacts  after winning a point in her second round match against Vera Zvonareva.   Photograph: Clive Brunskill/Getty Images

Serena Williams was reluctant to discuss suggestions of sexism at the Australian Open after a male on-court interviewer sparked outrage by asking some(...)

Serbia’s Ana Ivanovic  after loosing a point to Czech Republic’s Lucie Hradecka during their first round match for the Australian Open in Melbourne. Photograph: Joe Castro / EPA

When Heather Watson spoke about the crumbling hierarchy of women’s tennis, she was not being needlessly downbeat, just realistic.As results at the Au(...)

Maria Sharapova of Russia reacts after beating  Ana Ivanovic of Serbia in the final of the Brisbane International. Photograph: Jason Reed/Reuters

Tennis round-up: US Open champion Marin Cilic has withdrawn from the Australian Open because of a shoulder injury, the world number nine said on Satur(...)

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(...)

Serena Williams on her way to victory over American compatriot Vania King in round two of the n women’s singles at the US Open at  Flushing Meadows. Photograph: Mike Segar/Reuters

Serena Williams is beginning to look awesome again. Whatever Chicago’s claims to being the nation’s Windy City, New York can whistle up a fair breeze (...)

Catherine Bellis of the United States reacts after defeating Dominika Cibulkova of Slovakia during their women’s singles first round match on Day Two of the 2014 US Open. Photograph: Streeter Lecka/Getty Images

Fifteen-year-old American wild card Cici Bellis stunned Australian Open finalist Dominika Cibulkova in the biggest upset of the US Open so far. Bellis(...)