Zverev will next play the winner of the match between American Ben Shelton, the No 12 seed, and Hungarian Fabian Marozsan next. Ahead of his victory, the German made quick work of Russian Karen Khachanov (6-3, 6-2).

Carreno Busta defeated American Sebastian Korda, the No 16 seed (7-5, 6-1) and Australian wild card Max Purcell (6-3, 6-3) in the previous rounds in Cincinnati as he continues his comeback from injury.

Cincinnati Masters 1000, other last 16 results:

• Frances Tiafoe vs. Jiri Lehecka
• Hubert Hurkacz vs. Flavio Cobolli
• Ben Shelton vs. Fabian Marozsan
• Jannik Sinner vs. Jordan Thompson
• Andrey Rublev (6) beat Brandon Nakashima (WC): 7-6 (5), 6-1