Unknown Karolina Pliskova shocks Serena Williams, shatters 23rd Grand slam dream

Unknown Czech Karolina Pliskova pulled off the biggest upset in the women's draw as she beat world number one and defending champion Serena Williams in the semis, thus shattering Serena's bid to win a record 23rd Grand slam title

Unknown Karolina Pliskova shocks Serena Williams, shatters 23rd Grand slam dream

In arguably the biggest upset of the US Open 2016, Czech Republic's Karolina Pliskova pulled off a stunner upsetting Serena Williams in the semi- finals. The loss to Karolina Pliskova means Serena misses out her 23rd Grand Slam title and loses the number one ranking after a record 187th straight week at number one.

Pliskova, the 10th-seeded Czech playing in her first Grand Slam semi-final, triumphed 6-2, 7-6 (7/5) and will face German Angelique Kerber, who is set to be the new World number one when the latest rankings are due to be released soon.

"I don't believe it," said Pliskova, who had never made it past the third round of a Grand Slam in 17 prior attempts.

"I knew I had the chance to beat anyone if I played my game. I am excited to be in the final and to beat Serena as she is such a great champion. Even when she was down a set and break she was still fighting. I had to fight hard to win."

Williams said she had been hampered by a sore left knee since earlier in the tournament. Although it was a distraction, she said Pliskova earned her victory.

"Karolina played great today. I think if she had played any less, then maybe I would have had a chance," said Williams, who with one more Grand Slam title will move out of a tie with Steffi Graf for most in the Open Era.

"So I think I wasn't at 100 per cent, but I also think she played well. She deserved to win today."

Pliskova, who survived a match point en route to a fourth-round victory over Venus Williams, was nearly betrayed by her nerves as up 3-0 in the tiebreaker she produced three errors, including a double fault.

Williams led 4-3 and 5-4 in the decider but couldn't hang on, Pliskova taking it when Williams delivered her sixth double-fault of the match.

While Williams's serve has long been reckoned the most powerful weapon in women's tennis, 11th-ranked Pliskova came into the contest boasting a tour-leading 439 aces.

In a duel of power-hitters where protecting serve was crucial, Pliskova gained the upper hand with a break for 2-1 in the first set and Williams gave her a chance to serve it out with a shocking seventh game that started with a double-fault and continued with three errors to grant Pliskova a 5-2 lead. Pliskova pocketed the set in 26 minutes without facing a break point.