2021 Great Ocean Road Open

The 2021 Great Ocean Road Open was a tournament on the 2021 ATP Tour, one of six events in the 2021 Melbourne Summer Series. It was played on outdoor hard courts in Melbourne, Australia. It was organised as a lead-up tournament to the 2021 Australian Open, and was held at the same venue, due to other tournaments in Australia being cancelled as a result of the COVID-19 pandemic. This tournament took place simultaneously with the 2021 Murray River Open and the 2021 ATP Cup, and was considered a relocation of the men's 2021 Adelaide International.

Prize money

 * per team

Seeds

 * 1 Rankings are as of January 25, 2021

Other entrants
The following players received wildcards into the main draw:
 * 🇦🇺 Max Purcell
 * 🇦🇺 Tristan Schoolkate
 * 🇦🇺 John-Patrick Smith
 * 🇦🇺 Dane Sweeny

The following players have been accepted directly into the main draw using a protected or a special ranking:
 * Lu Yen-hsun
 * 🇵🇱 Kamil Majchrzak

The following players received entry as an alternate:
 * 🇦🇺 Matthew Ebden
 * 🇦🇺 Thomas Fancutt
 * 🇰🇷 Nam Ji-sung

Withdrawals

 * Before the tournament
 * 🇧🇦 Damir Džumhur → replaced by 🇦🇺 Matthew Ebden
 * 🇬🇧 Kyle Edmund → replaced by 🇮🇹 Gianluca Mager
 * Cristian Garín → replaced by 🇯🇵 Yasutaka Uchiyama
 * 🇺🇸 John Isner → replaced by 🇮🇹 Andreas Seppi
 * 🇧🇾 Ilya Ivashka → replaced by 🇰🇷 Nam Ji-sung
 * 🇺🇸 Steve Johnson → replaced by 🇵🇱 Kamil Majchrzak
 * 🇨🇦 Vasek Pospisil → replaced by 🇦🇺 Thomas Fancutt

Retirements

 * 🇭🇺 Attila Balázs

Seeds

 * Rankings are as of January 25, 2021.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * Robin Haase / 🇺🇸 Sam Querrey
 * 🇦🇺 Christopher O'Connell / 🇦🇺 Aleksandar Vukic

The following pairs received entry as alternates into the doubles main draw:
 * 🇪🇸 Roberto Carballés Baena / Pablo Cuevas
 * 🇦🇺 Tristan Schoolkate / 🇦🇺 Dane Sweeny

Withdrawals

 * Before the tournament
 * Robin Haase / 🇦🇹 Oliver Marach → replaced by 🇦🇺 Scott Puodziunas / 🇦🇺 Calum Puttergill
 * 🇺🇸 Steve Johnson / 🇺🇸 Sam Querrey → replaced by 🇪🇸 Roberto Carballés Baena / Pablo Cuevas
 * 🇺🇸 Reilly Opelka / 🇨🇦 Vasek Pospisil → replaced by 🇦🇺 Tristan Schoolkate / 🇦🇺 Dane Sweeny
 * During the tournament
 * 🇵🇱 Hubert Hurkacz / 🇮🇹 Jannik Sinner
 * 🇷🇸 Miomir Kecmanović / 🇷🇺 Karen Khachanov
 * 🇦🇺 Max Purcell / 🇦🇺 Jordan Thompson

Retirements

 * Nikoloz Basilashvili / 🇩🇪 Andre Begemann
 * 🇦🇺 Tristan Schoolkate / 🇦🇺 Dane Sweeny

Singles

 * 🇮🇹 Jannik Sinner def. 🇮🇹 Stefano Travaglia, 7–6(7–4), 6–4

Doubles

 * 🇬🇧 Jamie Murray / 🇧🇷 Bruno Soares def. 🇨🇴 Juan Sebastián Cabal / 🇨🇴 Robert Farah, 6–3, 7–6(9–7)