# 2021 Open d'Orléans – Singles

Mikael Ymer was the defending champion but chose not to defend his title.
Henri Laaksonen won the title after defeating Dennis Novak 6–1, 2–6, 6–2 in the final.

## Seeds

* Ugo Humbert (first round)
* Benjamin Bonzi (second round)
* Arthur Rinderknech (second round)
* Richard Gasquet (quarterfinals)
* Jiří Veselý (semifinals)
* Corentin Moutet (semifinals)
* Gilles Simon (first round)
* Pierre-Hugues Herbert (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 | Semifinals | Final | Final | Final | Final |
| | Dennis Novak | 6$^2$ | 7$^8$ | 6 | | | | |
| 6/WC | Corentin Moutet | 7$^7$ | 6$^6$ | 4 | | | | |
| 6/WC | Corentin Moutet | 7$^7$ | 6$^6$ | 4 | Dennis Novak | 1 | 6 | 2 |
| | | | | | Henri Laaksonen | 6 | 2 | 6 |
| 5 | Jiří Veselý | 3 | 3 | | Henri Laaksonen | 6 | 2 | 6 |
| | Henri Laaksonen | 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 | Semifinals |
| 1/WC | U Humbert | 6$^{12}$ | 4 | | | | | | | | | | | | | | | |
| | Q Halys | 7$^{14}$ | 6 | | | Q Halys | 4 | 4 | | | | | | | | | | |
| | G Barrère | 5 | 5 | | | D Novak | 6 | 6 | | | | | | | | | | |
| | D Novak | 7 | 7 | | | | | | | | D Novak | 7$^8$ | 7$^8$ | | | | | |
| | J Sousa | 4 | 6 | 4 | | | | | | Alt | R Bemelmans | 6$^6$ | 6$^6$ | | | | | |
| Alt | R Bemelmans | 6 | 4 | 6 | Alt | R Bemelmans | 3 | 7 | 6 | | | | | | | | | |
| | D Masur | 7$^7$ | 3 | 2 | 8 | P-H Herbert | 6 | 5 | 4 | | | | | | | | | |
| 8 | P-H Herbert | 6$^5$ | 6 | 6 | | | | | | | | | | | D Novak | 6$^2$ | 7$^8$ | 6 |
| 3 | A Rinderknech | 3 | 6 | 6 | | | | | | | | | | 6/WC | C Moutet | 7$^7$ | 6$^6$ | 4 |
| | A Hoang | 6 | 4 | 3 | 3 | A Rinderknech | 4 | 2 | | | | | | | | | | |
| | F Verdasco | 4 | 2 | | LL | H Grenier | 6 | 6 | | | | | | | | | | |
| LL | H Grenier | 6 | 6 | | | | | | | LL | H Grenier | 4 | 6$^5$ | | | | | |
| | E Gulbis | 3 | 2 | | | | | | | 6/WC | C Moutet | 6 | 7$^7$ | | | | | |
| | R Safiullin | 6 | 6 | | | R Safiullin | 4 | 6 | 6$^7$ | | | | | | | | | |
| Q | K Jacquet | 6$^1$ | 1 | | 6/WC | C Moutet | 6 | 2 | 7$^9$ | | | | | | | | | |
| 6/WC | C Moutet | 7$^7$ | 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 | Semifinals |
| 5 | J Veselý | 6$^5$ | 7$^7$ | 7$^7$ | | | | | | | | | | | | | | |
| Q | E Karlovskiy | 7$^7$ | 6$^0$ | 6$^3$ | 5 | J Veselý | 6 | 6 | | | | | | | | | | |
| | R Marcora | 1 | 3 | | | A Tabilo | 3 | 1 | | | | | | | | | | |
| | A Tabilo | 6 | 6 | | | | | | | 5 | J Veselý | 6$^6$ | 6 | 6 | | | | |
| | E Ymer | 3 | 6 | 1 | | | | | | 4 | R Gasquet | 7$^8$ | 4 | 2 | | | | |
| | L Pouille | 6 | 3 | 6 | | L Pouille | 6 | 6$^5$ | 3 | | | | | | | | | |
| Q | M Viola | 7$^7$ | 1 | 0 | 4 | R Gasquet | 3 | 7$^7$ | 6 | | | | | | | | | |
| 4 | R Gasquet | 6$^4$ | 6 | 6 | | | | | | | | | | | 5 | J Veselý | 3 | 3 |
| 7 | G Simon | 4 | 0 | | | | | | | | | | | | | H Laaksonen | 6 | 6 |
| | H Rune | 6 | 6 | | | H Rune | 6 | 6 | | | | | | | | | | |
| | R Berankis | 6$^0$ | 6 | 6 | | R Berankis | 2 | 4 | | | | | | | | | | |
| Q | B Schnur | 7$^7$ | 4 | 2 | | | | | | | H Rune | 3 | 4 | | | | | |
| | Z Bergs | 3 | 1 | | | | | | | | H Laaksonen | 6 | 6 | | | | | |
| | H Laaksonen | 6 | 6 | | | H Laaksonen | 7$^8$ | 6 | | | | | | | | | | |
| WC | H Mayot | 1 | 3 | | 2 | B Bonzi | 6$^6$ | 4 | | | | | | | | | | |
| 2 | B Bonzi | 6 | 6 | | | | | | | | | | | | | | | |