DOHA, Qatar - Kim Clijsters of Belgium beat Denmark's Caroline Wozniacki 6-3, 5-7, 6-3 to secure the title at the season-ending WTA Championships on Sunday.
The third-seeded Clijsters, who was unhurt in a car accident before Saturday's semifinal against Australia's Samantha Stosur, captured her 40th career singles title and fifth in 11 tournaments this year.
"It was a tough battle," Clijsters said. "We showed some great tennis and some great fitness. I think we showed the crowd some great women's tennis tonight."
She won in Brisbane to start the season, then captured the Miami tournament and also claimed the U.S. Open tuneup in Cincinnati before earning her second straight championship at Flushing Meadows.
Clijsters, playing for the first time since beating Russian Vera Zvonareva in New York for the Open title, also won the WTA Championships in 2002 and '03.
Wozniacki, who secured the year-end No. 1 ranking earlier this week, was appearing in a tour-leading eighth final this year. She lost to Jelena Jankovic at the Indian Wells final in March, but won titles at Ponte Vedra Beach, Copenhagen, Montreal, New Haven, Tokyo and Beijing.
"I gave my all today. I couldn't have played better," Wozniacki said.
Clijsters and Wozniacki met just once previously and it was a memorable win for the Belgian, who notched a 7-5, 6-3 triumph in the 2009 U.S. Open final.