Rain comes to Sharapova's rescue

Maria Sharapova reached the quarter-finals of the US Open for the first time since winning the title six years ago, but was given a real scare by fellow Russian Nadia Petrova.

The third seed had cause to thank the New York rain after a delay early in the decider helped her recover from 2-0 down to post a 6-1 4-6 6-4 victory under the lights on Arthur Ashe Stadium.