Sharapova wins Key Biscayne marathon

Maria Sharapova has won a 31/2-hour marathon to earn a semifinal

berth at the Sony Ericsson Open.

Sharapova rallied to beat No. 26-seeded Alexandra Dulgheru 3-6,

7-6 (6), 7-6 (5) in a match that ended at 12:19 a.m. Sharapova’s

opponent Thursday will be No. 21 Andrea Petkovic, who reached the

semifinals with her second upset in two days, beating No. 6 Jelena

Jankovic 2-6, 6-2, 6-4.

Petkovic eliminated No. 1 Caroline Wozniacki in the fourth

round.

Sharapova’s match took 3 hours, 28 minutes. She won despite 17

double-faults and twice as many unforced errors as Dulgheru.

Sharapova turned her ankle late in the third set and required

treatment from a trainer in the middle of a game, but the injury

didn’t appear to affect her.