With Maria Sharapova suffering from an uncharacteristic shaky serve and slovenliness, it was clear the world No. 1 was not having the best of times at the Toray Pan Pacific Open.

News photoMaria Sharapova is worked on by a WTA Tour trainer during Saturday's semifinal match against Serbia's Ana

Ivanovic in the Toray Pan Pacific Open. Sharapova retired with a hamstring injury to her left leg in the