Maria Sharapova lost the first four games Monday before settling down to become the first quarterfinalist at the Sony Open by beating Kirsten Flipkens 3-6, 6-4, 6-1.
The match was the second consecutive three-setter for Sharapova, a five-time Key Biscayne finalist seeking her first title in the event.
Seeded No. 4, Sharapova won only five points in the first four games and seemed thrown off by the lack of pace on Flipkens' shots. Sharapova gradually began to find the range with her groundstrokes, but even so she finished with 36 unforced errors and only 13 winners. She also double-faulted 10 times.
Serena and Venus Williams and Rafael Nadal are among those scheduled to play later Monday.