In a surprise attack from Karolina Pliskova, Serena Williams was defeated in the US Open Tennis Women’s semi final 6-2 7-6 (7-5).

Williams was hoping to break the record and hold 187 successive weeks as world number one. However she now remains tied with Steffi Graf for both Grand Slam titles, and the WTA record of 186 successive weeks as world number one.

“Karolina played great today,” said Williams, who revealed she had been troubled by a sore left knee since earlier in the tournament.

“I think if she had played any less then maybe I would have had a chance. So I think I wasn’t at 100%, but I also think she played well. She deserved to win today.”

Pliskova will take on Angelique Kerber on Saturday 10th September for the US Open Women’s Final.

Current Finals Betting odds are:

Pliskova 15/10 to Kerber 11/20.

Place your bets on the US Open Finals here.