Samantha Stosur
Samantha "Sam" Jane Stosur (/ˈstoʊsə/ STOH-ser; born 30 March 1984) is an Australian professional tennis player. She is a former World No. 1 in doubles, a ranking which she held for 61 weeks. Stosur is also a former World No. 4 in singles. Stosur won the 2011 U.S. Open, defeating Serena Williams in the final and becoming the first Australian woman since Evonne Goolagong Cawley in 1980 to win a Grand Slam singles tournament . Stosur has won five other Grand Slam titles to date; two in women's doubles; and three in mixed doubles. She was also a finalist at the singles event at the 2010 French Open.