Top-ranked Caroline Wozniacki rallied to defeat Agnieszka Radwanska of Poland 5-7, 6-2, 6-4 Tuesday in their opening round-robin match at the WTA Championships.
Wozniacki wasted a 4-2 lead in the third set but broke again when Radwanska netted a forehand on the Dane's second match point.
Wozniacki had also wasted three set points in the first set of a match where both players struggled to hold serve on the indoor hard court. The second set alone featured six breaks of serve, with Wozniacki getting four of them.
“It was a bit frustrating not to get the first set after having three set points, but I managed to keep my head cool and just fight back,” Wozniacki said.
In the early Red Group match, Wimbledon champion Petra Kvitova beat Vera Zvonareva of Russia 6-2, 6-4.
Making her first appearance at the season-ending tournament for the top eight players of the season, Kvitova wasted a 4-1 lead to be level at 4-4 in the second set but broke again immediately before wrapping up the win.
In the late match, Maria Sharapova was to begin White Group play against U.S. Open champion Sam Stosur.
The top two players in each group advance to the semifinals.
This is the first time the tournament is held in Istanbul, after being staged in Doha, Qatar, the last three years.
“The surface is a little bit weird,” Radwanska said. “It's pretty slow. So you really have to be used to it. I just hope I can play better in the next match.”