Simona Halep was forced to pull out of the upcoming Toray Pan Pacific Open due to a left hamstring injury.
WTA Staff

TOKYO, Japan - World No.5 Simona Halep announced that she will be unable to play at the Toray Pan Pacific Open because of a left hamstring injury.

"I am unfortunately not able to play at this year's Toray Pan Pacific Open due to a hamstring injury in my left leg," Halep said in a statement. "I've always enjoyed playing in front of my fans in Tokyo and hope to be back there very soon."

Halep reached the quarterfinals of the US Open, falling to top seed Serena Williams in three grueling sets.

Accepting a wildcard into the main draw is Petra Kvitova, who is coming off of a successful run in Flushing where she reached the fourth round to play eventual champion Angelique Kerber.