# 2021 Swedish Open – Men's singles

Nicolás Jarry was the reigning champion from when the tournament was last held in 2019, but chose to not defend his title.
Casper Ruud won the title, defeating Federico Coria in the final, 6–3, 6–3.

## Seeds

The top four seeds receive a bye into the second round.
* Casper Ruud (champion)
* Cristian Garín (quarterfinals)
* Fabio Fognini (second round)
* John Millman (second round)
* Richard Gasquet (first round)
* Lorenzo Musetti (first round)
* Jiří Veselý (second round)
* Emil Ruusuvuori (second round)

## 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 |
| 1 | Casper Ruud | 6 | 6 | | | | |
| | Roberto Carballés Baena | 1 | 4 | | | | |
| | Roberto Carballés Baena | 1 | 4 | 1 | Casper Ruud | 6 | 6 |
| | | | | | Federico Coria | 3 | 3 |
| | Yannick Hanfmann | 2 | 1 | | Federico Coria | 3 | 3 |
| | Federico Coria | 6 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | C Ruud | 6 | 6 | | | | | | | | | |
| | R Albot | 6 | 3 | 0 | WC | H Rune | 0 | 2 | | | | | | | | | |
| WC | H Rune | 4 | 6 | 6 | | | | | | 1 | C Ruud | w/o | | | | | |
| WC | E Ymer | 6 | 6$^6$ | 6 | | | | | | Q | H Laaksonen | | | | | | |
| | T Daniel | 2 | 7$^8$ | 4 | WC | E Ymer | 2 | 5 | | | | | | | | | |
| Q | H Laaksonen | 6 | 3 | 6 | Q | H Laaksonen | 6 | 7 | | | | | | | | | |
| 6 | L Musetti | 2 | 6 | 4 | | | | | | | | | | 1 | C Ruud | 6 | 6 |
| | | | | | | | | | | | | | | | R Carballés Baena | 1 | 4 |
| | | | | | 3 | F Fognini | 3 | 6 | 4 | | | | | | | | |
| | F Bagnis | 2 | 4 | | | R Carballés Baena | 6 | 1 | 6 | | | | | | | | |
| | R Carballés Baena | 6 | 6 | | | | | | | | R Carballés Baena | 6 | 6 | | | | |
| | P Cuevas | 6 | 6$^4$ | 2 | | | | | | | N Gombos | 4 | 2 | | | | |
| | N Gombos | 1 | 7$^7$ | 6 | | N Gombos | 6 | 6 | | | | | | | | | |
| WC | M Ymer | 6 | 4 | 3 | 8 | E Ruusuvuori | 2 | 4 | | | | | | | | | |
| 8 | E Ruusuvuori | 1 | 6 | 6 | | | | | | | | | | | | | |

### 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 |
| 7 | J Veselý | 6 | 6 | | | | | | | | | | | | | | |
| | S Caruso | 3 | 2 | | 7 | J Veselý | 4 | 3 | | | | | | | | | |
| | Y Hanfmann | 6 | 7 | | | Y Hanfmann | 6 | 6 | | | | | | | | | |
| | T Monteiro | 2 | 5 | | | | | | | | Y Hanfmann | 6 | 6 | | | | |
| | P Sousa | 1 | 1 | | | | | | | Q | A Rinderknech | 4 | 3 | | | | |
| Q | A Rinderknech | 6 | 6 | | Q | A Rinderknech | 6 | 3 | 6 | | | | | | | | |
| | | | | | 4 | J Millman | 3 | 6 | 3 | | | | | | | | |
| | | | | | | | | | | | | | | | Y Hanfmann | 2 | 1 |
| 5 | R Gasquet | 2 | 7 | 3 | | | | | | | | | | | F Coria | 6 | 6 |
| | M Cecchinato | 6 | 5 | 6 | | M Cecchinato | 6 | 4 | 3 | | | | | | | | |
| | F Coria | 6 | 6 | | | F Coria | 4 | 6 | 6 | | | | | | | | |
| Q | F Cerúndolo | 4 | 4 | | | | | | | | F Coria | 6 | 4 | 6 | | | |
| Q | D Novak | 5 | 1 | | | | | | | 2 | C Garín | 4 | 6 | 2 | | | |
| | P Martínez | 7 | 6 | | | P Martínez | 3 | 3 | | | | | | | | | |
| | | | | | 2 | C Garín | 6 | 6 | | | | | | | | | |

## Qualifying
### Seeds

* Arthur Rinderknech (qualified)
* Andrej Martin (qualifying competition)
* Francisco Cerúndolo (qualified)
* Dennis Novak (qualified)
* Henri Laaksonen (qualified)
* Marc-Andrea Hüsler (qualifying competition)
* Blaž Rola (qualifying competition)
* Thomas Fabbiano (qualifying competition)

### Qualifiers

* Arthur Rinderknech
* Henri Laaksonen
* Francisco Cerúndolo
* Dennis Novak

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Arthur Rinderknech | 6 | 7 | | | | |
| | Oscar José Gutierrez | 4 | 5 | | | | |
| | Oscar José Gutierrez | 4 | 5 | 1 | Arthur Rinderknech | 6 | 6 |
| | | | | 8 | Thomas Fabbiano | 3 | 2 |
| | Markus Eriksson | 6$^6$ | 4 | 8 | Thomas Fabbiano | 3 | 2 |
| 8 | Thomas Fabbiano | 7$^8$ | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Andrej Martin | 7$^7$ | 3 | 7 | | | | | |
| | Andrea Vavassori | 6$^0$ | 6 | 5 | | | | | |
| | Andrea Vavassori | 6$^0$ | 6 | 5 | 2 | Andrej Martin | 7 | 3 | 4 |
| | | | | | 5/Alt | Henri Laaksonen | 5 | 6 | 6 |
| | Yosuke Watanuki | 7$^7$ | 5 | 5 | 5/Alt | Henri Laaksonen | 5 | 6 | 6 |
| 5/Alt | Henri Laaksonen | 6$^4$ | 7 | 7 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Francisco Cerúndolo | 6 | 6 | | | | | | |
| WC | Leo Borg | 3 | 1 | | | | | | |
| WC | Leo Borg | 3 | 1 | | 3 | Francisco Cerúndolo | 3 | 6 | 7$^7$ |
| | | | | | 7 | Blaž Rola | 6 | 4 | 6$^2$ |
| WC | Carl Söderlund | 6 | 2 | 0 | 7 | Blaž Rola | 6 | 4 | 6$^2$ |
| 7 | Blaž Rola | 4 | 6 | 6 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Dennis Novak | 6 | 6 | | | | | |
| | Viktor Durasovic | 2 | 4 | | | | | |
| | Viktor Durasovic | 2 | 4 | | 4 | Dennis Novak | 6 | 6 |
| | | | | | 6 | Marc-Andrea Hüsler | 2 | 2 |
| | Roberto Marcora | 6 | 4 | 3 | 6 | Marc-Andrea Hüsler | 2 | 2 |
| 6 | Marc-Andrea Hüsler | 3 | 6 | 6 | | | | |