2021 Atlanta Open

The 2021 Atlanta Open is a professional tennis tournament to be played on hard courts. It is the 33rd edition of the tournament, and part of the 2021 ATP Tour. It take place at Atlantic Station in Atlanta, United States between July 24 and August 1, 2021. The tournament is hosted in the same week as the 2020 Summer Olympics.

Finals

Singles

John Isner defeated Brandon Nakashima 7–6, 7–5

It was Isner's 6th title in Atlanta and 16th title overall.

Doubles

Reilly Opelka / Jannik Sinner defeated Steve Johnson / Jordan Thompson 6–4, 6–7, .
Points and prize money

Point distribution

Prize money

Singles main-draw entrants

Seeds

¹ Rankings are as of July 19, 2021.
Other entrants

The following players received wildcards into the main draw:

The following player received entry using a protected ranking:

J. J. Wolf

The following player received entry as special exempt:

Brandon Nakashima

The following players received entry from the qualifying draw:

;Before the tournament

Grigor Dimitrov → replaced by Yasutaka Uchiyama
Egor Gerasimov → replaced by Mackenzie McDonald
Sebastian Korda → replaced by Denis Kudla
Adrian Mannarino → replaced by Ričardas Berankis
Tommy Paul → replaced by Andreas Seppi
Guido Pella → replaced by Kevin Anderson
Doubles main-draw entrants

Seeds

¹ Rankings are as of July 19, 2021.
Other entrants

The following pairs received wildcards into the doubles main draw:

Keshav Chopra / Andres Martin
Nick Kyrgios / Jack Sock