2009 US Open

The 2009 US Open was a Grand Slam tennis tournament that was held at Flushing Meadows, New York from August 31 to September 14. The event was held on outdoor hard courts. Juan Martín del Potro  and  Kim Clijsters won the singles titles.

The No. 6 seed Del Potro defeated five time defending champion in the final, Roger Federer. It was Del Potro's first grand slam final. Del Potro won the championship in a five set thriller, 3-6, 7-6, 4-6, 7-6, 6-2.

Kim Clijsters won the women's title for the second time, defeating Caroline Wozniacki in the final. Clijsters was granted a wildcard to the event after being retired for more than two years. Clijsters won the final in straight sets, 7-5, 6-3, becoming the first mother to win a grand slam tournament since Evonne Goolagong Cawley Evonne Goolagong Cawley in 1980. She also became the first unseeded and first wildcard to win the title.