Former US Open champ Juan Martin Del Potro got his season off to another successful start at the Delray Beach Open, defeating Kevin Anderson in straight sets and overcoming an opening set tumble in the process.

Two days after playing the Doha final, Caroline Wozniacki plunged straight back to work on Monday at the Dubai Tennis Championships with a 6-2, 7-5 first-round defeat of Darya Kasatkina.

Japanese top seed Kei Nishikori lost a sixth successive final on Sunday when he was defeated by Ukraine's Alexandr Dolgopolov 7-6 (7/4), 6-4 in the Buenos Aires clay-court title match.

Top seed Kei Nishikori survived a tough slog against unheralded opponent Carlos Berlocq before winning his semi-final match at the Argentina Open on Saturday.

Pat Rafter steps down as Tennis Australia's head of performance, ending his rocky relationship with the country's two polarising stars Nick Kyrgios and Bernard Tomic.

Novak Djokovic and Nick Kyrgios hope the Davis Cup heals the wounds of their painful Australian Open exits this weekend when they will be the only two men in the top 15 taking part.

Maria Sharapova said Wednesday she refused to feel sorry for herself during her doping ban, occupying her time by studying at Harvard, writing a book and even learning how to box.

Nick Kyrgios struggled to deal with the furore over his shock second round meltdown at the Australian Open but said the return to a team environment with Davis Cup had helped him through it.

Roger Federer dropped hints that his great career may be drawing to a close after his age-defying win over his Grand Slam nemesis Rafael Nadal at the Australian Open.

American Abigail Spears and Colombian partner Juan Sebastian Cabal swept to a first Grand Slam mixed doubles title Sunday with a straight-sets victory at the Australian Open.

Serena Williams clinched a record 23rd grand slam title at the Australian Open on Saturday but spent most of the immediate aftermath talking about her older sister Venus.

Second seeds Bethanie Mattek-Sands and Lucie Safarova took out the Australian Open women's doubles title on Friday to be crowned Grand Slam champions for a fourth time.

Roger Federer made it as clear as he politely could that he would welcome the chance to renew his epic rivalry with Rafa Nadal, who plays Grigor Dimitrov in the second semifinal today, as he chases his 18th grand slam title.

Serena Williams ended the fairytale run of Mirjana Lucic-Baroni at the Australian Open on Thursday with a crushing 6-2 6-1 win that set up a final against her sister Venus.

Venus Williams drew on the experience of 73 grand slam campaigns to come from a set down for a 6-7(3) 6-2 6-3 victory over fellow American Coco Vandeweghe on Thursday to set up a possible Australian Open final against her sister Serena.

Rafael Nadal claimed a dominant straight-sets win over world number three Milos Raonic to advance to the semifinals at the Australian Open on Wednesday.

Rafael Nadal claimed a dominant straight-sets win over world number three Milos Raonic to advance to the semifinals at the Australian Open on Wednesday.

Former champion Stan Wawrinka engaged in a war of words with Jo-Wilfried Tsonga but won the argument that counted to storm into the Australian Open semi-finals with a 7-6(2) 6-4 6-3 win over the Frenchman on Tuesday.

Venus Williams continued her astonishing late-career revival by felling Anastasia Pavlyuchenkova 6-4 7-6(3) on Tuesday to reach her first Australian Open semi-final in 14 years and become the oldest woman to reach the last four at Melbourne Park in the professional era.

Andy Murray is yet to reach his maximum potential and should only get better but the world number one has not seen the back of Novak Djokovic, according to eight-times grand slam champion Andre Agassi.