Naomi Osaka Retires In Toronto Masters Opener With Back Pain
Four-time Grand Slam champion Naomi Osaka retired from her opening match on Tuesday at the WTA Toronto Masters with lower back pain, raising injury concerns with the US Open looming. Estonia's Kaia Kanepi advanced when Osaka retired trailing 7-6 (7/4), 3-0. Kanepi, a runner-up last week in Washington, needed 71 minutes on court as she broke three times before the Japanese star called it quits. Defeat drove the emotional Osaka to tears.