Carson, California:Australia's Samantha Stosur defeated Ana Ivanovic of Serbia 6-3, 6-2 in the third round of the LA Women's Tennis Championships on Thursday.
Stosur, seeded 13th, needed 62 minutes to overcome the 2007 tournament champion and No. 6 seed.
Stosur broke Ivanovic's serve in the eighth game of the opening set and three times in the second to control the match.
Ivanovic defeated Stosur 7-5, 6-2, in the round of 32 at Wimbledon. But on Thursday she struggled with her ball toss on serve throughout the match and said Stosur was "putting a lot of pressure on my serve. I think that was the big difference today because once we got into rallies it was pretty close."