Maria through to the quarters in Los Angeles

Maria Sharapova survived an injury and another challenge from a fellow Russian, defeating Anna Chakvetadze in 3 sets 4-6, 6-4, 7-5 Thursday in a third-round match at the JPMorgan Chase Open.


Sharapova said she played in pain from an inflamed right pectoral muscle that affected her ability to serve hard and pound forehands.



"It wasn't me out there today," she said. "I'm serving 93 miles per hour and not hitting my forehand. With that, it's tough to come out against a player that has nothing to lose."



Sharapova said she first injured the muscle in October in Zurich, playing with heavier balls.



"Since then, it's been an on and off problem for me," she said. "I don't think the pain is going to go away with me trying to play and hit as hard as I can."



In the quarters Maria will play Daniela Hantuchova of Slovakia .


If Maria can beat Hantuchova she will become the new world #1.