ATP - Toronto 2R start

First round completed and second round commenced in Toronto.

2021 National Bank Open presented by Rogers - an ATP Masters 1000 tournament, on Hard, in Toronto, Canada, 6-15 August 2021.

Event not held last year due to COVID-19

Defending champion (2019):

Rafael Nadal (1) who defeated Daniil Medvedev (8) 6-3 6-0

Top seed Rafael Nadal withdrew after the main draw was published due to a foot injury, and was replaced by lucky loser Feliciano Lopez 

Lopez receives the first round bye previously given to Nadal.

Sebastian Korda withdrew after the main draw was published due to lower back pain, and was replaced by lucky loser Frances Tiafoe.

First round results:

- Nikoloz Basilashvili defeated wildcard Jenson Brooksby 2-6 6-0 6-4

- Kei Nishikori defeated Miomir Kecmanović 6-4 6-7(5) 6-2

- John Isner defeated Alejandro Davidovich Fokina 6-4 6-1

- Lucky loser Frances Tiafoe defeated qualifier Yoshihito Nishioka 6-4 6-3

- Dusan Lajovic defeated qualifier Emil Ruusuvuori 3-6 6-3 6-3

- Karen Khachanov defeated Cameron Norrie 6-4 5-7 6-4

- Benoit Paire defeated Mackenzie McDonald 6-3 6-4

Second round results:

- Daniil Medvedev (1) defeated Alexander Bublik 4-6 6-3 6-4

- Casper Ruud (6) defeated Marin Cilic 6-3 3-6 6-3

- Stefanos Tsitsipas (3) defeated Ugo Humbert 6-3 6-7(13) 6-1

- Reilly Opelka defeated Grigor Dimitrov (14) 6-3 6-4