Serena Williams exploded any doubts about her form on Tuesday as she swept into the Australian Open second round on her return to Grand Slam action.

Serena Williams suffered a shock second-round defeat at the Auckland Classic Wednesday following her sister Venus's earlier withdrawal with an arm injury.

Computer hackers who leaked the medical records of more than 100 top athletes in a bid to reveal questionable drug exemptions may have tampered with the data, according to the World Anti-Doping Agency (WADA).

The World Anti-Doping Agency slams Russian hackers who breached its database and published confidential records of US Olympic gymnast Simone Biles and tennis stars Venus and Serena Williams.

Serena Williams crashes out of the US Open, her semi-final defeat to Karolina Pliskova costing her a shot at a 23rd Grand Slam title.

World number one Serena Williams fends off spirited Simona Halep, downing the fifth-seeded Romanian 6-2, 4-6, 6-3 to reach the US Open semi-finals.

Simona Halep does something no one else was able to do against Serena Williams at the U.S. Open but still cannot not stop the world number one from advancing to the semi-finals.

Venus Williams moves within two wins of a possible sisterly showdown with Serena in the semi-finals of the U.S. Open by beating German 26th seed Laura Siegemund.

World number one Serena Williams opens her U.S. Open account with a tidy 6-3 6-3 win over Ekaterina Makarova.

Serena Williams' hopes of a fifth Olympic gold medal are crushed by Ukraine's Elina Svitolina as the battle for the women's title in Rio is blown wide open.

Novak Djokovic, Andy Murray, Rafael Nadal and Serena Williams will display their Grand Slam talents in Rio, but with serious questions being asked over tennis's place in the Olympics after a host of high-profile pull-outs.

With a record-equalling 22nd Grand Slam title wrapped up, Serena Williams insists she will never get bored of winning and that is bad news for her flagging rivals.

Serena Williams powered to her seventh Wimbledon crown as the world number one finally claimed a record-equalling 22nd major title with a 7-5, 6-3 victory over Angelique Kerber in Saturday's final.

Serena and Venus Williams close in on a fifth all-sister Wimbledon final while beaten quarter-finalist Dominika Cibulkova prepares to rush back to Slovakia to get ready for her wedding.

Dominika Cibulkova could be forced to postpone her wedding after a shock Wimbledon win over world number three Agnieszka Radwanska, while Serena and Venus Williams march into the quarter-finals.

World number 1 and Wimbledon defending champion Novak Djokovic goes perilously close to exiting the tournament at the earliest stage since 2008 before rain intervenes.

Rafael Nadal faces a battle to qualify for the Rio Olympics after the International Tennis Federation announced the entry list for the 2016 Games.

Williams, Murray and Wawrinka go through to the second round at Wimbledon while Nick Kyrgios has yet another fallout with the chair umpire.

One hundred and forty thousand punnets of strawberries ripened to perfection, 256 players dreaming of singles glory, 19 courts trimmed with precision - all for two weeks and one tournament. Wimbledon is here.

Serena Williams may have been second best at the French Open on Saturday but the American has moved ahead of fellow tennis player Maria Sharapova to top the women's earnings list in sports, according to Forbes Magazine.