The Russian extended a remarkable summer run by clinching her third title in two months after beating rising Chinese player Zheng Qinwen 7-5, 7-5 at the Toray Pan Pacific Open.

The Aussie last incurred an ACL tear in 2013, and was already in the midst of a comeback from an Achilles surgery when the injury occurred against Naomi Osaka on Tuesday.

"I wish I could have stepped on court, but my body won't let me. I will see you next year," the former world No. 1 said.

Badosa, Garcia and Wimbledon champion Elena Rybakina have been knocked out of the Pan Pacific Open in Tokyo.

Saville incurred a worrying knee injury one game into their Toray Pan Pacific Open first round on Tuesday.