Maria Sharapova claimed her first title since April 2008 when Jelena Jankovic retired during the first set of their Toray Pan Pacific Open final.
The unseeded Russian, ranked 25th in the world, was leading 5-2 in the first set when the seventh-seeded Serb withdrew because of a right wrist injury.
The 2009 Toray Pan Pacific title is Sharapova’s first since her comeback from a shoulder injury in May. The Russian had been out for nine long months.
“To go from not knowing whether you’ll ever play the sport again to holding a trophy, it’s an unbelievable feeling,” said the 22-year-old Grand Slam champion.