Katie Boulter responds to Sonay Kartal run by backing up Japan Open win

Katie Boulter is one match away from immediately reclaiming the British No 1 ranking after advancing to the quarter-finals of the Japan Open.

Boulter required less than an hour to defeat Viktorija Golubic 6-2 6-1 after returning to the court for a th... [1200 chars]

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