Sports Serena Williams loses US Open semifinals match September 11, 2015 Share on Facebook Tweet on Twitter Serena Williams (left), Roberta Vinci (right). On Friday, Serena Willaims was beaten by unseeded Italian Roberta Vinci 2-6, 6-4, 6-4 in the semifinals of the US Open, ending her calendar Grand Slam Bid. Entering Friday, Williams had never dropped a set against Vinci. Get the latest from CNW!