Slovakia (Gallery) 2007 U.S. Tennis Open:Contenders:Serena Williams:Matches [1p.2n]2007 U.S. Tennis Open:Contenders:Roger Federer:Matches [1p.1n]2007 U.S. Tennis Open:Contenders:Maria Sharapova:Matches [1p.1n]2007 U.S. Tennis Open:Contenders:Jelena Jankovic:Matches [1p.7n]2007 U.S. Tennis Open:Contenders:Martina Hingis:Matches [1p.2n]2007 U.S. Tennis Open:New York City [2p.10n]2007 U.S. Tennis Open:Contenders:Maria Sharapova:Public Relations [1p.1n] p1   p1   p1   Martina Hingis returns a shot at the U.S. Open tennis tournament in Flushing Meadows, New York, September 1, 2007. click to open Switzerland's Martina Hingis returns to Britain's Naomi Cavaday during their Women's Singles, first round match at Wimbledon Tennis Championships, Monday, June 25, 2007. click to open   p1   p1   p1