Katie Boulter advanced to the semi-finals of the Pan Pacific Open in Tokyo with a decisive 6-2, 6-1 victory over former US Open champion Bianca Andreescu. The British No.1, ranked 33rd in the world, broke Andreescu's serve five times in a match that lasted just over an hour. Boulter, who has not dropped a set in the tournament, will face American Sofia Kenin in the semi-final. Her performance follows a series of strong victories during the Asian swing, despite earlier challenges in the season. Boulter expressed pride in her progress, stating she has 'nothing to lose' and credits her team's hard work for her recent success. The tournament also saw top seed Zheng Qinwen advance to the semi-finals after defeating Leylah Fernandez.