New British number one Boulter loses Japan semi-final

Katie Boulter has lost in the Japan Open semi-finals, in her first match since reclaiming the British number one spot from Sonay Kartal.

Kartal moved above Boulter in the world rankings by reaching the final of last week's Wuhan Open.

But Boulter's run to the last four in Osaka, which included a victory over Antonia Ruzic in the quarter-finals, will be enough for her to go back above Kartal when the rankings are next updated.

However, the 30-year-old missed the chance to reach the final, and a shot at a fifth WTA singles title, losing 6-1 6-4 to doubles world number one Katerina Siniakova.