Claim: Roger Federer is a tennis player.

The 2007 US Open was held from 27 August to 9 September 2007 , at USTA Billie Jean King National Tennis Center at Flushing Meadows , New York City .   Roger Federer successfully defended his title , becoming the first man in the open era to win four consecutive US Open titles . Maria Sharapova was unsuccessful in defending her 2006 title , being upset in the third round by 18-year-old Agnieszka Radwańska of Poland . Justine Henin , the runner-up to Sharapova in 2006 , won her second US Open title , this year without losing a set . It was the second Grand Slam she won in the year without losing a set , having also won the 2007 French Open earlier in the year . It was also her last grand slam title .