Former world number-one Martina Navratilova will make a WTA singles comeback at the age of 47, accepting an invitation to the  000-dollar Amelia Island clay-court event that opens on Monday. Navratilova said on Friday that she also plans to play the following week at Charleston, South Carolina.

Michael Schumacher will attempt to capture a record sixth formula one driving crown in Indianapolis Sunday at the United States Grand Prix while Juan Pablo Montoya and Kimi Raikkonen try to deny the German star. But Schumacher refuses to concede any edge at Indy to Montoya or his BMW.