Top-seeded Qinwen Zheng of China claimed the Toray Pan Pacific Open title with a 7-6 (5), 6-3 win over American wild card Sofia Kenin on Sunday and clinched her place in the WTA finals next month. The No.

Olympic champion Zheng Qinwen moved into the Tokyo final but her opponent Sofia Kenin was left sweating on her fitness after retiring from her doubles match on Saturday.

Olympic champion seals place in season-ending WTA Finals, while Kenin - who played with her right thigh strapped - can take many positives China's Zheng Qinwen produced near-flawless serves to defeat American Sofia Kenin 7-6(5),