Naomi Osaka has withdrawn from the WTA Finals in Shenzhen.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."

Fils claims first ATP Masters title, Gauff clinches second Cincinnati crown
Barcelona launch LaLiga title defence with five-star Elche demolition
Torres double rescues point for PSG at Rennes in Ligue 1 opener
F1 confirms Abu Dhabi Grand Prix will close 2026 season
Norris wins Dutch GP as Antonelli stretches his F1 lead
