Australian Open 2009

Switzerland's Roger Federer returns the ball during a training session for the Australian Open in Melbourne on Sunday. (AP Photo)

Spain's Rafael Nadal serves during a training session for the Australian Open in Melbourne on Sunday. (AP Photo)

France's Gael Monfils returns the ball during a training session for the Australian Open in Melbourne on Sunday. (AP Photo)

Britain's Andy Murray strikes a pose during a training session for the Australian Open in Melbourne on Sunday. (AP Photo)

Australia's Lleyton Hewitt tosses the ball during a training session for the Australian Open in Melbourne on Sunday. (AP Photo)

Spain's Rafael Nadal returns a ball during a training session for the Australian Open in Melbourne on Sunday. (AP Photo)

Serbia's Ana Ivanovic smiles during a press conference at the Australian Open in Melbourne on Saturday. (AP Photo)

Serena Williams arrives at a press conference at the Australian Open in Melbourne on Saturday. (AP Photo)

Venus Williams answers questions during a press conference at the Australian Open in Melbourne on Saturday. (AP Photo)

Serbia's Jelena Jankovic smiles during a press conference at the Australian Open in Melbourne on Saturday. (AP Photo)