Serena Williams will miss the entire World TeamTennis season after cutting her foot.

The WTT said Monday she was to have played four matches for the Washington Kastles, but she hurt the bottom of her foot late last week and needed stitches.

It was not clear how she was injured. A message left with her publicist was not immediately returned.

Williams won her fourth Wimbledon crown this month and lost an exhibition to Kim Clijsters last Thursday before a record crowd in Brussels. She says she is “very disappointed” to miss the WTT season.

Her opening match was to have been last Friday against the New York Buzz in Glens Falls, N.Y. She also will miss matches in Philadelphia on Tuesday, Washington on Wednesday and New York on Thursday.