Name the unseeded tennis player who won the 2009 US Open in only her third tournament since coming out of retirement.
2009 US Open (tennis) a wild card entry, returning to professional tennis after more than two years of retirement. She made it to the women's singles semi-finals, where she knocked out the defending champion Serena Williams in controversial circumstances. In the final, Clijsters defeated Caroline Wozniacki, the first Dane, man or woman, to reach a Grand Slam final in the Open Era, in straight sets: 7–5, 6–3. Clijsters thus became the first mother to win a Grand Slam since Evonne Goolagong Cawley in 1980. In the process, she also became the first unseeded player and wildcard to win the tournament. In the men's singles
2016 US Open (tennis) at the end of the 2015 season. This tournament turned out to be the last one in the career of former No.1 player in the world and 2008 French Open women's singles champion Ana Ivanovic, who announced her retirement from professional tennis at the end of the year. The 2016 US Open was the 136th edition of the tournament and it was held at the USTA Billie Jean King National Tennis Center in Flushing Meadows–Corona Park of Queens in New York City, New York, United States. The tournament was an event run by the International Tennis Federation (ITF) and was