NEW YORK (AP) A look at the U.S. Open, the year's last Grand Slam tennis tournament:
Surface: Hard courts.
Site: USTA Billie Jean King National Tennis Center.
Schedule: Play begins Monday. The women's singles final is Sept. 11; the men's singles final is Sept. 12.
No. 1-Seeded Man: Rafael Nadal of Spain.
No. 1-Seeded Woman: Caroline Wozniacki of Denmark.
2009 Men's Singles Champion: Juan Martin del Potro of Argentina, who will not defend his title in 2010 after having wrist surgery in May.
2009 Women's Singles Champion: Kim Clijsters of Belgium, the first mother to win a Grand Slam title since 1980.
Last Year: Because of rain, both singles finals were pushed back a day, with the women finishing on Sunday, and the men on Monday. Del Potro came back to beat five-time reigning champion Roger Federer of Switzerland 3-6, 7-6 (5), 4-6, 7-6 (4), 6-2 for his first Grand Slam title. It's the only time Federer has lost to someone other than Rafael Nadal in a major final. Clijsters won her second U.S. Open championship by beating Wozniacki 7-5, 6-3. It was Clijsters' first Grand Slam tournament after taking 2 1/2 years off to start a family.
Missing in 2010: In addition to del Potro, only the third reigning men's champion since 1968 to skip the following U.S. Open, three-time women's champion Serena Williams withdrew from the tournament, saying she is not recovered fully after surgery for cuts on her right foot in July. Williams is the first No. 1 woman to miss the U.S. Open since the women's rankings began in 1975. Two-time champion Justine Henin is out for the season after injuring her elbow at Wimbledon.
Noteworthy: Nadal is trying to complete a career Grand Slam by winning the U.S. Open for the first time. He has won the past two major tournaments, the French Open and Wimbledon, to raise his total to eight Grand Slam championships. Nadal never has made it past the semifinals at Flushing Meadows.
Prize Money: Total is about $22.7 million, with $1.7 million each to the men's and women's singles champions - plus the possibility of bonus money for the top three finishers in the U.S. Open Series of tuneup tournaments.
TV: ESPN2, Tennis Channel, CBS.
New on TV: For the first time, microphones will be in the players' guest boxes at Arthur Ashe Stadium, with sound bites broadcast on tape delay. Also, 3-D telecasts will make their U.S. Open debut on DirecTV.
Online: www.usopen.org