Serena Williams misses out on calendar Grand Slam with shock loss

Serena Williams suffered one of the greatest shocks in tennis history today.

Serena Williams suffered one of the greatest shocks in tennis history as unseeded Italian Roberta Vinci ended the American’s hopes of a calendar grand slam with a stunning victory in the US Open semi-finals.

Vinci, ranked 43rd in the world, had never gone further than the quarter-finals of a major tournament before but the 32-year-old came from a set down to beat Williams 2-6 6-4 6-4.