Gauff demolishes Kostiuk — Polish coach misses Cincinnati semi-final

Coco Gauff comfortably beat Marta Kostiuk in front of her home crowd, allowing the Ukrainian only four games. Kostiuk is coached by Polish coach Sandra Zaniewska, who will not advance further. The full line-up of semi-finalists at the WTA 1000 Cincinnati tournament is now set, with Iga Świątek already through.