World number one and defending champion Serena Williams will face Maria Sharapova in the Australian Open quarter-final.

Novak Djokovic has denied "absurd" allegations in an Italian newspaper that he "wanted to lose" a match at the Paris Masters in 2007.

More players reveal match-fixing approaches on Tuesday as the Australian Open Grand Slam tournament came under close scrutiny following claims that corruption in tennis was widespread.

Novak Djokovic and Roger Federer are poised to become the first $100 million men in tennis in 2016, in a gripping sub-plot to the new Grand Slam season.

"Fantastic Friday" at the US Open sees Serena Williams, Novak Djokovic and Roger Federer in starring roles.

Rafael Nadal remains on course for a 10th French Open title with a straight-sets victory over fellow Spaniard Nicolas Almagro in the second round.

Andy Murray and Heather Watson face familiar opponents in the French Open second round on Thursday.