Top-ranked Iga Swiatek fought through a tough match and a dispute with the chair umpire to defeat Marketa Vondrousova and advance to the semifinals of the Western & Southern Open. Despite a slow start, Swiatek broke Vondrousova when she was serving for the first set and went on to win a tiebreaker before dominating in the second set. The Polish player credited Vondrousova's left-handed serve for making things difficult but ultimately adjusted to secure the victory.

Swiatek also had a post-match exchange with the chair umpire after feeling rushed by Vondrousova throughout the match. While Swiatek respected the umpire's adherence to the rules, she expressed the need to breathe and take her time on the court. Despite the distractions, Swiatek remained focused and will now face seventh-seeded Coco Gauff in the semifinals.

In other matches, second-seeded Aryna Sabalenka defeated Ons Jabeur to reach the semifinals for the second consecutive year, and she will face Karolina Muchova. Sabalenka's strong performance puts her in contention to challenge Swiatek for the top spot in the WTA rankings.

Swiatek's victory and her ongoing reign as the world number one solidify her position as one of the top players in women's tennis. All eyes will now be on her and Gauff as they face off in what promises to be a thrilling semifinal match.