2015 US OPEN: Upset Of The Century! Vinci Defeats Serena In Semifinal, Denying Her Grand Slam Bid

In one of the greatest upsets in sports history, unseeded Italian Roberta Vinci recorded her first ever victory over Serena Williams in the semifinals of the U.S. Open, where Serena had won three consecutive titles, denying the 21-time major champion her chance to win a calendar Grand Slam.
The score was 2-6 6-4 6-4. Serena was 25-3 in major semifinals before today and 43-1 against unseeded players a

With Flavia Pennetta winning the other semifinal the women's final will be an all-Italian affair between first-time finalists for the first time since the 2010 French Open between Francesca Schiavone and Samantha Stosur. Pennetta was a 150-to-1 shot and Vinci a 300-to-1 shot to win the title at the beginning of the tournament. Tomorrow one of them will be the 2015 U.S. Open champion.