Naomi Osaka has withdrawn from the WTA Finals in Shenzhen.
The world number three from Japan picked up a shoulder injury after beating Petra Kvitova in three sets in her opening match on Sunday.
She'll now be replaced by alternate Kiki Bertens.
"I look forward to getting healthy and hope to be back here in Shenzhen next year," said Osaka.
"I'm disappointed to have to withdraw. This is not how I wanted to end this tournament or my season."
Sabalenka, Pegula maintain winning momentum at US Open
Two-time defending champion Aryna Sabalenka continued her imposing run at the US Open with a composed 6-3 6-4 victory over Kamilla Rakhimova in the third round on Friday, extending her bid for a fifth Grand Slam title.
India to play Japan in historic T20I
The reigning T20 world champions India will play Japan for the first time in an international match when the teams meet at the Sano International Cricket Ground in Tochigi on September 22, the two cricket boards said on Friday.
Zverev survives Halys scare to reach US Open third round
Alexander Zverev survived another almighty scare at the US Open as the top seed overcame Frenchman Quentin Halys 6-4 4-6 7-6(3) 6-7(3) 6-3 on Thursday to secure a place in the third round of the Grand Slam.
Clinical Rybakina marches into US Open third round
World number two Elena Rybakina has put on a dominant performance to beat Spain's Jessica Bouzas Maneiro 6-2 6-4 and reach the third round of the US Open on Thursday.
Australia's Kyrgios given one-month ban for 'social' cocaine use
Australian tennis player Nick Kyrgios has accepted and served a reduced, one-month suspension under anti-doping rules after testing positive for cocaine at an ATP Tour event in Mallorca, Spain in June, the International Tennis Integrity Agency (ITIA) said.
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