# 2021 Open International de Tennis de Roanne – Singles

This was the first edition of the tournament.
Hugo Grenier won the title after defeating Hiroki Moriya 6–2, 6–3 in the final.

## Seeds

* Benoît Paire (first round)
* Richard Gasquet (second round)
* Jiří Veselý (first round, retired)
* Mikael Ymer (second round)
* Henri Laaksonen (first round)
* Dennis Novak (withdrew)
* Radu Albot (quarterfinals)
* Antoine Hoang (first round)
* Hugo Grenier (champion)

## 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 |
| | Hiroki Moriya | 6 | 6 | | | | |
| | Manuel Guinard | 2 | 3 | | | | |
| | Manuel Guinard | 2 | 3 | | Hiroki Moriya | 2 | 3 |
| | | | | 9 | Hugo Grenier | 6 | 6 |
| | Mathias Bourgue | 4 | 4 | 9 | Hugo Grenier | 6 | 6 |
| 9 | Hugo Grenier | 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 |
| 1/WC | B Paire | 6$^4$ | 6 | 4 | | | | | | | | | | | | |
| LL | J Sels | 7$^7$ | 3 | 6 | LL | J Sels | 6 | 6 | | | | | | | | |
| Alt | K Jacquet | 4 | 2 | | | K Coppejans | 4 | 4 | | | | | | | | |
| | K Coppejans | 6 | 6 | | | | | | | LL | J Sels | 2 | 4 | | | |
| | H Moriya | 3 | 6 | 7$^9$ | | | | | | | H Moriya | 6 | 6 | | | |
| | A Ritschard | 6 | 3 | 6$^7$ | | H Moriya | 3 | 6 | 7 | | | | | | | |
| Q | Georgii Kravchenko | 6 | 6 | | Q | G Kravchenko | 6 | 4 | 5 | | | | | | | |
| 5 | H Laaksonen | 4 | 4 | | | | | | | | | | | H Moriya | 6 | 6 |
| 3 | J Veselý | 5 | 2$^r$ | | | | | | | | | | | M Guinard | 2 | 3 |
| | M Guinard | 7 | 3 | | | M Guinard | 7$^7$ | 6$^5$ | 6 | | | | | | | |
| | A Kuznetsov | 6 | 7 | | | A Kuznetsov | 6$^5$ | 7$^7$ | 3 | | | | | | | |
| | A Müller | 2 | 5 | | | | | | | | M Guinard | 6 | 6 | | | |
| | A Arnaboldi | 7 | 6 | | | | | | | | A Arnaboldi | 2 | 3 | | | |
| Q | C Hemery | 5 | 4 | | | A Arnaboldi | 3 | 6 | 6 | | | | | | | |
| | T Fabbiano | 6 | 6$^3$ | 6 | | T Fabbiano | 6 | 2 | 4 | | | | | | | |
| 8 | A Hoang | 4 | 7$^7$ | 4 | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | R Albot | 6 | 6 | | | | | | | | | | | | | | |
| LL | L Vanni | 2 | 3 | | 7 | R Albot | 6 | 6 | | | | | | | | | |
| WC | G Mpetshi Perricard | 7$^7$ | 4 | 6 | WC | G Mpetshi Perricard | 4 | 4 | | | | | | | | | |
| | S Diez | 6$^3$ | 6 | 3 | | | | | | 7 | R Albot | 3 | 6$^1$ | | | | |
| | M Bourgue | 6 | 6 | | | | | | | | M Bourgue | 6 | 7$^7$ | | | | |
| LL | V Orlov | 3 | 2 | | | M Bourgue | 6 | 4 | 6 | | | | | | | | |
| | G Blancaneaux | 6 | 4 | 3 | 4 | M Ymer | 0 | 6 | 4 | | | | | | | | |
| 4 | M Ymer | 4 | 6 | 6 | | | | | | | | | | | M Bourgue | 4 | 4 |
| 9 | H Grenier | 6$^6$ | 6 | 6 | | | | | | | | | | 9 | H Grenier | 6 | 6 |
| | M Janvier | 7$^8$ | 3 | 4 | 9 | H Grenier | 6 | 6 | | | | | | | | | |
| | A Pellegrino | 6 | 2 | 3 | Q | G Debru | 2 | 3 | | | | | | | | | |
| Q | G Debru | 4 | 6 | 6 | | | | | | 9 | H Grenier | 7$^7$ | 7 | | | | |
| WC | A Cazaux | 6 | 6 | | | | | | | WC | A Cazaux | 6$^4$ | 5 | | | | |
| PR | J Cagnina | 2 | 2 | | WC | A Cazaux | 5 | 6 | 6 | | | | | | | | |
| | L Giustino | 4 | 3 | | 2 | R Gasquet | 7 | 3 | 4 | | | | | | | | |
| 2 | R Gasquet | 6 | 6 | | | | | | | | | | | | | | |