FACTBOX: U.S. Open champion Serena Williams

(Reuters) - Factbox on American Serena Williams, who won her third U.S. Open title with a 6-4 7-5 win over Serbian Jelena Jankovic on Sunday:

Born: September 26, 1981 in Saginaw, Michigan, United States

Grand slam titles: Nine (U.S. Open 1999, 2002, 2008; French Open 2002; Wimbledon 2002, 2003; Australian Open 2003, 2005, 2007)

*Becomes lowest-ranked player in 1997 to defeat two Top 10 players in one tournament, beating number seven Mary Pierce and number four Monica Seles in Chicago after entering as a 304th-ranked wildcard.

*Wins mixed doubles titles in 1998 at Wimbledon and U.S. Open with Max Mirnyi.

*Wins her first grand slam crown at 1999 U.S. Open, where she beat Martina Hingis in the final.

*Wins 1999 Paris Indoors on same day that Venus triumphs at Oklahoma City. The Williamses become the first sisters in pro tennis history to win singles titles in the same week.

*Breaks into Top 10 for first time in April 1999, ranked ninth. Helps U.S. win the Fed Cup. Wins Roland Garros and U.S. Open doubles titles with Venus.

*Loses 2001 U.S. Open final to Venus. Flushing Meadows final is first meeting between sisters in a grand slam title match since Maud Watson beat Lilian at Wimbledon in 1884.