2021 Qatar ExxonMobil Open

The 2021 Qatar Open (also known as 2021 Qatar ExxonMobil Open for sponsorship reasons) was the 29th edition of the Qatar Open, a men's tennis tournament which is played on outdoor hard courts. It was part of the ATP Tour 250 of the 2021 ATP Tour. It took place at the Khalifa International Tennis and Squash Complex in Doha, Qatar from 8 to 14 March 2021. The tournament was awarded the Tournament of the Year award in the 250 category from the 2019 ATP Awards for the third time in five years.

Singles

 * Nikoloz Basilashvili defeated 🇪🇸 Roberto Bautista Agut, 7–6(7–5), 6–2

Doubles

 * 🇷🇺 Aslan Karatsev / 🇷🇺 Andrey Rublev defeated 🇳🇿 Marcus Daniell / 🇦🇹 Philipp Oswald, 7–5, 6–4.

Seeds

 * 1 Rankings are as of 1 March 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇹🇳 Malek Jaziri
 * 🇷🇺 Aslan Karatsev
 * 🇶🇦 Mubarak Shannan Zayid

The following players received entry from the qualifying draw:
 * Lloyd Harris
 * 🇦🇺 Christopher O'Connell
 * 🇮🇳 Ramkumar Ramanathan
 * Blaz Rola

The following player received entry as a lucky loser:
 * 🇸🇰 Norbert Gombos

Withdrawals

 * Before the tournament
 * Kevin Anderson → replaced by Nikoloz Basilashvili
 * 🇪🇸 Pablo Carreño Busta → replaced by 🇫🇷 Richard Gasquet
 * Borna Ćorić → replaced by 🇸🇰 Norbert Gombos
 * 🇵🇱 Hubert Hurkacz → replaced by 🇰🇿 Alexander Bublik
 * 🇫🇷 Gaël Monfils → replaced by 🇨🇦 Vasek Pospisil
 * During the tournament
 * 🇭🇺 Márton Fucsovics
 * 🇫🇷 Richard Gasquet

Seeds

 * 1 Rankings are as of 1 March 2021.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇹🇳 Malek Jaziri / 🇶🇦 Mubarak Shannan Zayid
 * Blaž Rola / 🇶🇦 Mousa Shanan Zayed

Retirements

 * 🇩🇰 Frederik Nielsen / 🇩🇪 Tim Pütz