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Sharapova gets past Lisicki in 2 sets at US Open

US Open Tennis

Maria Sharapova reached the U.S. Open's fourth round by taking five of the last six games after her opponent, Sabine Lisicki, was warned by the chair umpire about receiving coaching help.

Sam Groth, of Australia, serves to Roger Federer, of Switzerland, during the second round of the 2014 U.S. Open tennis tournament Friday, Aug. 29, 2014, in New York.

    Many happy returns for Roger Federer at US Open

    When Roger Federer smacked a backhand return winner off his opponent's 142 mph (229 kph) serve Friday night, he glanced at the speed readout, just to find out exactly how difficult what he'd done had been.

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