Vinci beats Serena, ends hope of calendar Grand Slam

Italy's Roberta Vinci caused a huge shock as she beat Serena Williams at the US Open on Saturday to end the American's hopes of a calendar Grand Slam.

Vinci, the world number 43 and playing her first Grand Slam semi-final, won 2-6 6-4 6-4 in New York.

Williams, 33, had been two wins from completing a clean sweep of all four majors in 2015.

Vinci, 32, will play Flavia Pennetta in an all-Italian final at Flushing Meadows on Saturday.

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