Tiafoe vs Nakashima — an all-American semi-final in Cincinnati

Frances Tiafoe (seeded 17th) will face compatriot Brandon Nakashima (27th) in an all-American semi-final at the Cincinnati ATP 1000 hardcourt event. The other semi-final will see Italian Flavio Cobolli (7th) take on Frenchman Arthur Fils (21st).