The Swedish tennis star has joined head coach Severin Luthi ahead of Federer's first Grand Slam tennis tournament of 2014, the Australian Open.
Victoria Azarenka has won a scrappy final against Li Na to successfully defend her Australian Open title and retain the world number one ranking.
Tiger Woods needs a back-nine comeback at the Presidents Cup if and he and his partner Steve Stricker hope to win their foursomes match.
New South Wales, Otago, the defending champion Bulls and Sharks remain perfect after two rounds of rugby's Super 15 tournament.
The new kids on the Super 15 rugby block -- the Rod Macqueen-led Melbourne Rebels -- have been impressive in lead-up games.
Asian Games officials took urgent action on Monday to get more people into the stands, making an additional 400 000 tickets available for sale.
After producing the best performance in the Soccer World Cup thus far with their drubbing of Australia, Germany are being extra wary of Serbia.
The Williams sisters held court at the Australian Open on Thursday, a Venus-Serena doubleheader that saw them leaving all challengers behind.
Five or six players on the Women's Tennis Association tour have been approached to throw tennis matches, tour chairperson Larry Scott said on Tuesday. "I've said several initially, and I think five or six would be in the ballpark," Scott said. "I don't want to go into any more details because it's part of an investigation.
Australian swim officials huddled on Saturday to discuss a report that Ian Thorpe, the world record holder and Olympic champion, showed "abnormal levels" of two banned substances in a doping test last year before he retired. Anti-doping officials in Australia threw out the case against Thorpe, one of the sport's most recognisable athletes, for lack of scientific proof.