Serena Williams needs surgery on her right foot after cutting it on a broken glass at a restaurant.
The top-ranked women's player was injured last week and will miss three tournaments leading to the U.S. Open, the WTA Tour said Saturday.
Williams has withdrawn from tournaments in Istanbul, Cincinnati and Montreal. The tour website offered no details about what happened at the restaurant.
"I'm so upset I won't be able to play in the upcoming events because of this foot surgery," Williams said on the website. "Thank you for all of your support. I can't wait to get back on the courts."
A message left with her agent was not immediately returned.
On Monday, World TeamTennis said Williams would miss the entire season. Her Washington Kastles team said she cut the bottom of her foot and needed stitches.
On July 10, Williams attended the wedding of Denver Nuggets star Carmelo Anthony in New York. In a photo, it appeared she had two bandages on the top of her right foot.
Williams won her fourth Wimbledon crown and 13th major title in July. The Rogers Cup in Montreal begins Aug. 16, and the U.S. Open starts Aug. 30.
After winning the Australian Open at the end of January, Williams was sidelined through April because of an injured left knee. She lost in the French Open quarterfinals in June before capturing Wimbledon.