Former U.S. Open champion Sloane Stephens is only 2-4 in matches this year.
INDIAN WELLS, Calif. (AP) Roger Federer rolled past No. 25 seed Filip Krajinovic 6-2, 6-1 in pursuit of a record sixth BNP Paribas Open title, while Sloane Stephens remained mired in her post-U.S. Open slump.
Federer improved to 65-5 since returning from a left knee injury last year with his third-round victory in a rare day match Monday. The Swiss star's young son, Lenny, watched from a box wearing a Superman cap.
Stephens lost to Daria Kasatkina of Russia 6-4, 6-3, and fell to 2-4 in matches this year.
Kasatkina has beaten all four of the current Grand Slam champions in the last year: French Open winner Jelena Ostapenko, Australian Open winner Caroline Wozniacki, Wimbledon winner Garbine Muguruza and now Stephens.