Hingis also said on Tuesday in a conference call from England that she will play legends doubles with former partner Anna Kournikova at Wimbledon.
Hingis is returning to play a full season of World Team Tennis this summer after a two-year ban for testing positive for cocaine in 2007.
The former No 1 player denied taking the drug but did not appeal the ban.
The 29-year-old Hingis will play 14 matches for the Albany-based New York Buzz.
In early July, her team plays twice against the Washington squad led by Serena and Venus Williams.