SINGAPORE (AP) Maria Sharapova improved to 2-0 at the WTA Tour finals by beating top-seeded Simona Halep 6-4, 6-4 Tuesday.
The Russian's two wins this week are her only victories since a leg injury sidelined her after losing to Serena Williams in the Wimbledon semifinals.
She retired with a left wrist injury in her first match back at the Wuhan Open in China last month.
Sharapova led 5-1 in the second set but Halep won three straight games to get back into it. The fourth-seeded Sharapova then broke in the 10th game to win and leave Halep with a 1-1 record.
Sharapova's victory kept Agnieszka Radwanska in the tournament despite her 7-6 (5) 6-4 loss to U.S. Open champion Flavia Pennetta earlier Tuesday.
Radwanska is 0-2 while Pennetta, who will retire after this event, is 1-1.
''Of course it was important today to win this match, because like this I still have a little bit of chance, no?'' Pennetta said. ''But it's good to be in this position.''