NEW YORK (AP) -- The Latest on the U.S. Open (all times local):
Serena Williams' U.S. Open semifinal has been postponed until Friday because of rain in the forecast.
Williams is trying to become the first tennis player since Steffi Graf in 1988 to win all four Grand Slam singles titles -- the Australian Open, French Open, Wimbledon and U.S. Open -- in the same season.
The U.S. Tennis Association says both women's semifinals -- No. 1-seeded Williams against unseeded Roberta Vinci of Italy, and No. 2 Simona Halep of Romania against No. 26 Flavia Pennetta of Italy -- are being rescheduled for Friday, starting at 11 a.m.
The men's semifinals will then be played afterward, beginning at 5 p.m., instead of the originally scheduled 3 p.m.
Williams vs. Vinci was supposed to start Thursday night at 7 p.m., followed by the other women's semifinal.