Maria Sharapova battles into quarters of Zurich open

Maria Sharapova has moved through to the quarter-finals of the Zurich Open with a 6-4 7-6 (7-4) victory over Israeli Shahar Peer.

Maria eased through the first set before a tireless Peer held a set point against the No.2 seed at 5-4. After saving the set point and getting it back to 5-all, Maria Sharapova won the second set tie-breaker and the match in just over two hours.