Serena Williams was upset in the US Open women's semifinal by Roberta Vinci on Friday and that put an end to Williams going for the calendar Grand Slam after losing 2-6, 6-4, 6-4 in the match.
Williams came in as the heavy favorite as the number one player in the world and she was upset by the number 43 player in the world in Vinci, who was making her first appearance in a Grand Slam semi. Williams had won four straight Grand Slam titles to give her a "Serena Slam" and Williams was looking to win the calendar Grand Slam after previously winning the Australian Open, the French Open and Wimbledon this year.
Williams was going for the first calendar slam in nearly three decades, but Vinci put an end to that with a tough performance. Vinci previously had never been this far in a Grand Slam tournament and it gave Williams her first loss in a slam since back in 2014. Williams had won the US Open for four years and had not lost a match in Flushing since before those titles.
Williams and Vinci had played before, but in those matches, Vinci had never won a set against Williams. Vinci was able to take the second set of the match and after going up in the third set, she was able to hang on and completed the victory against the top ranked Williams.
Vinci was interviewed after the match and said: "It's an incredible moment for me"