Samantha Jane Stosur is an Australian former professional tennis player. Stosur reached a career-high singles ranking of world No. 4 on 21 February 2011.
Stosur won a Grand Slam singles title at the 2011 US Open, where she beat Serena Williams in the final and became the first Australian woman since Evonne Goolagong Cawley in 1980 to win a Grand Slam singles tournament.
She was also a former world No. 1 in doubles, a ranking which she first achieved on 6 February 2006 and held for 61 consecutive weeks.
