Hingis will play five events, including U.S. Open
The formerly retired Martina Hingis will not only play doubles at previously announced tournaments in Carlsbad and New Haven, but also plans to play doubles in Toronto, Cincinnati and the U.S. Open, Yonex announced on its web site.
Hingis, a former world No. 1 in singles and doubles, plays with a Yonex racquet.
The 32-year-old Swiss, who was inducted into the International Tennis Hall of Fame earlier this month, will play in Carlsbad with Daniela Hantuchova, but she has yet to announce whether she will play with the Slovak at the other four tournaments, or play with different partners.