Naomi Osaka receives treatment on the court during a medical timeout against Kiki Bertens at the WTA Finals in Singapore. Photo: AP
WTA Finals Singapore 2018: Naomi Osaka retires with leg injury against Kiki Bertens
- The US Open champion takes a medical time out before retiring
- Kiki Bertens was 5-3 up in first set of third group match
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WTA Finals
Naomi Osaka receives treatment on the court during a medical timeout against Kiki Bertens at the WTA Finals in Singapore. Photo: AP