# 2021 Qatar ExxonMobil Open – Singles

Nikoloz Basilashvili defeated Roberto Bautista Agut in the final, 7–6$^{(7–5)}$, 6–2 to win the men's singles tennis title at the 2021 Qatar Open. Basilashvili saved a match point against Roger Federer in the quarterfinals.
Andrey Rublev was the defending champion, but lost in the semifinals to Bautista Agut.
This tournament marked the return of former world No. 1 Federer to the tour for the first time since the 2020 Australian Open, due to a pair of knee surgeries since then. His defeat to Basilashvili marked a record-extending 24th and final loss from match point up in his career.

## Seeds

The top four seeds received a bye into the second round.
* Dominic Thiem (quarterfinals)
* Roger Federer (quarterfinals)
* Andrey Rublev (semifinals)
* Denis Shapovalov (quarterfinals)
* Roberto Bautista Agut (final)
* David Goffin (second round)
* Stan Wawrinka (first round)
* Borna Ćorić (withdrew)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 5 | Roberto Bautista Agut | 6 | 6 | | | | |
| 3 | Andrey Rublev | 3 | 3 | | | | |
| 3 | Andrey Rublev | 3 | 3 | 5 | Roberto Bautista Agut | 6$^5$ | 2 |
| | | | | | Nikoloz Basilashvili | 7$^7$ | 6 |
| | Taylor Fritz | 6$^3$ | 1 | | Nikoloz Basilashvili | 7$^7$ | 6 |
| | Nikoloz Basilashvili | 7$^7$ | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | D Thiem | 6$^5$ | 6 | 6 | | | | | | | | | |
| WC | MS Zayid | 4 | 0 | | WC | A Karatsev | 7$^7$ | 3 | 2 | | | | | | | | | |
| WC | A Karatsev | 6 | 6 | | | | | | | 1 | D Thiem | 6$^3$ | 6 | 4 | | | | |
| Q | R Ramanathan | 4 | 2 | | | | | | | 5 | R Bautista Agut | 7$^7$ | 2 | 6 | | | | |
| | A Bublik | 6 | 6 | | | A Bublik | 4 | 3 | | | | | | | | | | |
| | R Opelka | 6 | 3 | 4 | 5 | R Bautista Agut | 6 | 6 | | | | | | | | | | |
| 5 | R Bautista Agut | 4 | 6 | 6 | | | | | | | | | | | 5 | R Bautista Agut | 6 | 6 |
| | | | | | | | | | | | | | | | 3 | A Rublev | 3 | 3 |
| | | | | | 3 | A Rublev | w/o | | | | | | | | | | | |
| | R Gasquet | 6 | 6 | | | R Gasquet | | | | | | | | | | | | |
| Q | B Rola | 4 | 4 | | | | | | | 3 | A Rublev | w/o | | | | | | |
| | D Lajović | 6$^3$ | 3 | | | | | | | | M Fucsovics | | | | | | | |
| | M Fucsovics | 7$^7$ | 6 | | | M Fucsovics | 4 | 7$^7$ | 6 | | | | | | | | | |
| Q | L Harris | 7$^7$ | 6$^6$ | 7 | Q | L Harris | 6 | 6$^5$ | 2 | | | | | | | | | |
| 7 | S Wawrinka | 6$^3$ | 7$^8$ | 5 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 6 | D Goffin | 6 | 6 | | | | | | | | | | | | | | |
| | F Krajinović | 4 | 4 | | 6 | D Goffin | 1 | 7 | 6$^9$ | | | | | | | | |
| | L Sonego | 6$^5$ | 4 | | | T Fritz | 6 | 5 | 7$^{11}$ | | | | | | | | |
| | T Fritz | 7$^7$ | 6 | | | | | | | | T Fritz | 5 | 6 | 7 | | | |
| Q | C O'Connell | 3 | 4 | | | | | | | 4 | D Shapovalov | 7 | 3 | 5 | | | |
| | V Pospisil | 6 | 6 | | | V Pospisil | 5 | 4 | | | | | | | | | |
| | | | | | 4 | D Shapovalov | 7 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | | T Fritz | 6$^3$ | 1 |
| LL | N Gombos | 2 | 5 | | | | | | | | | | | | N Basilashvili | 7$^7$ | 6 |
| WC | M Jaziri | 6 | 7 | | WC | M Jaziri | 2 | 2 | | | | | | | | | |
| | N Basilashvili | 2 | 6 | 6 | | N Basilashvili | 6 | 6 | | | | | | | | | |
| | J Millman | 6 | 4 | 2 | | | | | | | N Basilashvili | 3 | 6 | 7 | | | |
| | J Chardy | 4 | 6 | 2 | | | | | | 2 | R Federer | 6 | 1 | 5 | | | |
| | D Evans | 6 | 1 | 6 | | D Evans | 6$^8$ | 6 | 5 | | | | | | | | |
| | | | | | 2 | R Federer | 7$^{10}$ | 3 | 7 | | | | | | | | |

## Qualifying
### Seeds

* Lloyd Harris (qualified)
* Norbert Gombos (qualifying competition, lucky loser)
* Christopher O'Connell (qualified)
* Blaž Rola (qualified)
* Thomas Fabbiano (qualifying competition)
* Lukáš Lacko (qualifying competition)
* Ramkumar Ramanathan (qualified)
* Marcelo Melo (first round)

### Qualifiers

* Lloyd Harris
* Ramkumar Ramanathan
* Christopher O'Connell
* Blaž Rola

### Lucky loser

* Norbert Gombos

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | 1 | Lloyd Harris | 6 | 6 |
| | | | | 6 | Lukáš Lacko | 4 | 3 |
| WC | Mousa Shanan Zayed | 1 | 1 | 6 | Lukáš Lacko | 4 | 3 |
| 6 | Lukáš Lacko | 6 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | 2 | Norbert Gombos | 3 | 1 |
| | | | | 7 | Ramkumar Ramanathan | 6 | 6 |
| Alt | Frederik Nielsen | 4 | 1 | 7 | Ramkumar Ramanathan | 6 | 6 |
| 7 | Ramkumar Ramanathan | 6 | 6 | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | | 3 | Christopher O'Connell | 6 | 7$^9$ | |
| | | | | | 5 | Thomas Fabbiano | 3 | 6$^7$ | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | 4 | Blaž Rola | 7$^7$ | 6 |
| | | | | Alt | Tim Pütz | 6$^5$ | 2 |
| Alt | Tim Pütz | 6 | 6 | Alt | Tim Pütz | 6$^5$ | 2 |
| 8/Alt | Marcelo Melo | 3 | 2 | | | | |