Major upset as Serena Williams is defeated by Karolina Pliskova at the US open Semi-finals in two blistering sets.
It was a shocking defeat. Serena will have to wait for a record-breaking 23rd grand slam title after the American endured an unexpected US Open final defeat to Karolina Pliskova.
On the edge of making history. Williams stood two victories away from beating Steffi Graf's Open-era best 22 major triumphs but her charge was ended in stunning fashion by Pliskova, who who won 6-2 7-6 (7/5).
Double loss. The disappointment is doubled for Williams as it means she will also surrender the world number one ranking at the end of the tournament to Germany's Angelique Kerber.
Pliskova will go on to the final. She will now face either Kerber or Denmark's Caroline Wozniacki in her first grand slam final on Saturday.
First time ever. The world number 11 had never gone past the third round of a major tournament before but she simply outplayed Williams at her own game, with power, aggression and a blistering serve.
Here is what she said after her well deserved win over the legendary Williams.
"I don't believe it," Pliskova said on court afterwards. "Actually I do believe it. I always knew I had a chance to beat anyone if I play my game.
"It is amazing to be in the US Open final and to beat Serena because she is a champion.
"Even down a set and a break, she is still fighting but I'm just really happy I stayed there and got the win."
Williams who showed signs of wobbling during the second set, later admitted to suffering a left knee injury she sustained in the second round.