Mother knows best: Serena opts out of Aussie…

Defending champion Serena Williams has withdrawn from the Australian Open, saying she is not ready to return to tournament tennis

Sharapova, Kerber and Djokovic into 2nd round in…

Maria Sharapova, Angelique Kerber and Novak Djokovic ensured there were all kinds of successful comebacks on Day 2 of the Australian Open

The Latest: 2014 champ Wawrinka wins on return from injury

Stan Wawrinka struggled at times in his first match since last year's Wimbledon, but held on to beat Lithuania's Ricardas Berankis 6-3, 6-4, 2-6, 7-6 (2) in the first round of the Australian Open

Major letdown for US women: Venus, Stephens out…

Venus Williams and Sloane Stephens were upset early and the bleak opening day for Americans continued at the Australian Open

Murray withdraws, Muguruza retires with cramps in Brisbane

Andy Murray withdrew from the Brisbane International citing ongoing problems with his right hip hours after women's top seed Garbine Muguruza retired in the third set of her opening match because of a leg cramps

Roger Federer wins in straight sets at Hopman Cup

Roger Federer continued preparation for his Australian Open title defense with a 6-3, 7-6 (8) win over Karen Khachanov at the Hopman Cup, helping give Switzerland a 2-0 win over Russia

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Germany one win away from Hopman Cup final vs Switzerland

Two-time Grand Slam singles champion Angelique Kerber beat Australia's Daria Gavrilova 6-1, 6-2 to put Germany one win away from a Hopman Cup final against Roger Federer and Belinda Bencic of Switzerland

Ostapenko upset by Makarova in 1st round at Sydney

French Open champion Jelena Ostapenko had an upset 7-6 (3), 6-1 loss to Ekaterina Makarova on a sweltering opening day of the Sydney International

Wawrinka says he's ready for Aussie Open, knee not a worry

Former Australian Open champion Stan Wawrinka says he's ready for this year's tournament beginning next Monday after being sidelined from competitive tennis for six months

Injured Murray withdraws from Brisbane, considers surgery

Andy Murray is considering surgery after having to withdraw from his only competitive tuneup for the Australian Open because of the hip complaint that has sidelined him since July

Haase beats Kavcic in 1st round of Maharashtra Open

Fifth-seeded Robin Haase started the new year with a 7-6 (6), 7-5 victory over Blaz Kavcic in the first round of Maharashtra Open on Tuesday

Raonic upset by De Minaur in 2nd round at Brisbane

Former champion Milos Raonic lost in straight sets to 18-year-old Alex De Minaur in a second-round upset Wednesday at the Brisbane International

Kei Nishikori out of Australian Open because wrist not ready

Kei Nishikori's agent says the 2014 U.S. Open runner-up is pulling out of the Australian Open

6-time champion Djokovic unsure of playing…

Novak Djokovic is still not sure whether he will be able to play in the Australian Open

Muguruza accepts Sydney wildcard after early Brisbane exit

Wimbledon champion Garbine Muguruza has been given a wildcard entry to play in the Sydney International next week after leg cramps forced her to retire from her first match of the season in Brisbane

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Sharapova, Halep advance to semifinals at Shenzhen Open

Five-time major winner Maria Sharapova and top-seeded Simona Halep advance at Shenzhen Open

Hip problem forces 5-time finalist Murray out of…

Andy Murray has withdrawn from the Australian Open two days after pulling out of a tuneup tournament in Brisbane because of a lingering right hip problem

Defending champions Dimitrov, Pliskova advance in Brisbane

Grigor Dimitrov had to save two match points before getting his Brisbane International title defense underway with a victory against Australian wildcard entry John Millman

Great sport: Dimitrov helps rival, then advances…

Grigor Dimitrov secured a spot in the Brisbane International semifinals two games after hurdling the net to check on the welfare of injured opponent Kyle Edmund and helping the British player to a courtside chair for treatment