At Mahwah, N.J., top-seeded Conchita Martinez got a jolt in her preparations for the U.S. Open, losing to Japan’s Ai Sugiyama 3-6, 6-4, 4-6 in the second round of the Pathmark Tennis Classic. Martinez of Spain is ranked third; Sugiyama is ranked 62nd.

Calling herself too much of an activist to be a banner politician, Martina Navratilova announced she will not seek another term as president of the WTA Tour Players Association and is also resigning her spot on the tour’s board of directors.

Elected a year ago, Navratilova had two main goals on her agenda: the return of Monica Seles and the acquisition of a title sponsor for the women’s game.