2021 Atlanta Open

The 2021 Atlanta Open (also known as the Truist Atlanta Open for sponsorship reasons) 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.

Singles
It was Isner's 6th title in Atlanta and 16th title overall.
 * 🇺🇸 John Isner def. 🇺🇸 Brandon Nakashima 7–6(10–8), 7–5

Doubles

 * 🇺🇸 Reilly Opelka / 🇮🇹 Jannik Sinner def. 🇺🇸 Steve Johnson / 🇦🇺 Jordan Thompson 6–4, 6–7(6–8), [10–3].

Prize money

 * per team

Seeds

 * 1 Rankings are as of July 19, 2021.

Other entrants
The following players received wildcards into the main draw:
 * 🇺🇸 Trent Bryde
 * 🇨🇦 Milos Raonic
 * 🇺🇸 Jack Sock

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:
 * 🇷🇺 Evgeny Donskoy
 * 🇺🇸 Bjorn Fratangelo
 * 🇩🇪 Peter Gojowczyk
 * 🇦🇺 Christopher O'Connell

Withdrawals

 * 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

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