16:00 CET - Good afternoon and welcome to our coverage of today's quarter-final action in Ohio!
Play gets started in a few hours at 19:00 CET, as home favourite and 2019 champion Madison Keys takes on Czechia's Sara Bejlek, who claimed the scalp of top seed Aryna Sabalenka in the previous round.
Following that clash, men's sixth seed Taylor Fritz comes up against the in-form Brandon Nakashima in an all-American affair, as both men look to reach the Cincinnati semi-finals for the first time.
Later on, Italy's Lorenzo Musetti faces former finalist Frances Tiafoe, with the American chasing a first Masters 1000 semi-final since reaching the showpiece event back in 2024.
The final match of the day sees women's fourth seed Coco Gauff take on Ukraine's red-hot Marta Kostyuk, as the 2023 champion looks to reach the last-four stage at a third consecutive tournament.
Check out the full men's draw here and the full women's draw here.