Angelique Kerber, the Australian Open champion, crashed out of the BNP Paribas Open in Indian Wells, Calif., on Saturday, and two other top-seeded women also left in the second round at Indian Wells Tennis Garden.
The second-seeded Kerber of Germany lost, 7-5, 7-5, to Denisa Allertova of the Czech Republic in the opening match of the day on the main stadium court. Fourth-seeded Garbiñe Muguruza of Spain dropped a 7-5, 6-1 decision to Christina McHale of the United States, and sixth-seeded Carla Suárez Navarro of Spain withdrew because of a right ankle injury.
Kerber, who beat Serena Williams in January for the title in Australia, led Allertova, 4-2, in the second set but fell behind, 6-5, then double-faulted, giving Allertova match point.