ATP - Cincinnati 2R start

First round completed and second round commenced in Cincinnati.

2021 Western & Southern Open - an ATP Masters 1000 tournament, on Hard, in Cincinnati, Ohio, 16-22 August 2021.

Event held last year in New York City due to COVID-19

2020 champion (not defending):

Novak Djokovic (1) who defeated Milos Raonic 1-6 6-3 6-4

First round results:

- Alexander Bublik defeated qualifier Marcos Giron 3-6 6-3 7-6(5)

- Grigor Dimitrov defeated Roberto Bautista Agut (13) 6-3 6-4

- Hubert Hurkacz (9) defeated Alejandro Davidovich Fokina 6-1 6-7(3) 6-1

- Marin Cilic defeated Aslan Karatsev 7-5 6-3

- Gaël Monfils defeated Dusan Lajovic 7-6(0) 6-2

- John Isner defeated Cameron Norrie 4-6 7-6(5) 6-4

- Reilly Opelka defeated qualifier Corentin Moutet 7-6(3) 4-6 6-4

- Wildcard Frances Tiafoe defeated Ugo Humbert 7-5 7-6(9)

- Qualifier Tommy Paul defeated Cristian Garin (16) 4-6 6-3 6-4

- Lorenzo Sonego defeated qualifier Carlos Alcaraz 6-3 7-6(6)

- Sebastian Korda defeated Laslo Djere 6-4 6-4

Second round results:

- Benoit Paire defeated Denis Shapovalov (6) 6-3 4-6 7-5

- Matteo Berrettini (5) defeated Albert Ramos-Vinolas 6-7(5) 6-3 7-5