# 2021 Teréga Open Pau–Pyrénées – Singles

Ernests Gulbis was the defending champion but chose not to defend his title.
Radu Albot won the title after defeating Jiří Lehečka 6–2, 7–6$^{(7–5)}$ in the final.

## Seeds

* Feliciano López (quarterfinals)
* Holger Rune (semifinals)
* Gilles Simon (first round)
* Dennis Novak (first round)
* Norbert Gombos (quarterfinals)
* Maxime Cressy (quarterfinals)
* Radu Albot (champion)
* Zdeněk Kolář (first 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 |
| 7 | Radu Albot | 6 | 6$^3$ | 6 | | | | |
| | Sergiy Stakhovsky | 2 | 7$^7$ | 1 | | | | |
| | Sergiy Stakhovsky | 2 | 7$^7$ | 1 | 7 | Radu Albot | 6 | 7$^7$ |
| | | | | | | Jiří Lehečka | 2 | 6$^5$ |
| | Jiří Lehečka | 3 | 6 | 6 | | Jiří Lehečka | 2 | 6$^5$ |
| 2 | Holger Rune | 6 | 3 | 4 | | | | |

### 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 | Semifinals |
| 1 | F López | 6 | 6 | | | | | | | | | | | | | | | | |
| | T Fabbiano | 2 | 1 | | 1 | F López | 6 | 4 | 6 | | | | | | | | | | |
| | D Ajduković | 0 | 7$^7$ | 6 | | D Ajduković | 3 | 6 | 4 | | | | | | | | | | |
| | C-h Tseng | 6 | 6$^5$ | 2 | | | | | | 1 | F López | 3 | 6$^5$ | | | | | | |
| | A Giannessi | 5 | 6 | 2 | | | | | | 7 | R Albot | 6 | 7$^7$ | | | | | | |
| Q | Georgii Kravchenko | 7 | 4 | 6 | Q | G Kravchenko | 6$^2$ | 4 | | | | | | | | | | | |
| | C Lestienne | 2 | 6 | 2 | 7 | R Albot | 7$^7$ | 6 | | | | | | | | | | | |
| 7 | R Albot | 6 | 4 | 6 | | | | | | | | | | | 7 | R Albot | 6 | 6$^3$ | 6 |
| 4 | D Novak | 3 | 1 | | | | | | | | | | | | | S Stakhovsky | 2 | 7$^7$ | 1 |
| | S Stakhovsky | 6 | 6 | | | S Stakhovsky | 6 | 4 | 6 | | | | | | | | | | |
| | S Diez | 6 | 6$^2$ | 2 | WC | D Added | 4 | 6 | 4 | | | | | | | | | | |
| WC | D Added | 1 | 7$^7$ | 6 | | | | | | | S Stakhovsky | 6 | 1 | 7$^7$ | | | | | |
| | A Arnaboldi | 2 | 4 | | | | | | | 5 | N Gombos | 4 | 6 | 6$^5$ | | | | | |
| Alt | P Kotov | 6 | 6 | | Alt | P Kotov | 3 | 4 | | | | | | | | | | | |
| WC | G Debru | 4 | 1 | | 5 | N Gombos | 6 | 6 | | | | | | | | | | | |
| 5 | N Gombos | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | Z Kolář | 4 | 4 | | | | | | | | | | | | | | | |
| WC | H Mayot | 6 | 6 | | WC | H Mayot | 6 | 4 | 7$^7$ | | | | | | | | | |
| Q | M Geerts | 6 | 6 | | Q | M Geerts | 0 | 6 | 6$^5$ | | | | | | | | | |
| | R Marcora | 4 | 2 | | | | | | | WC | H Mayot | 4 | 2 | | | | | |
| | M Janvier | 3 | 7$^7$ | 3 | | | | | | | J Lehečka | 6 | 6 | | | | | |
| Q | C Hemery | 6 | 6$^5$ | 6 | Q | C Hemery | 6$^4$ | 6 | 5 | | | | | | | | | |
| | J Lehečka | 6 | 6$^2$ | 6 | | J Lehečka | 7$^7$ | 4 | 7 | | | | | | | | | |
| 3 | G Simon | 1 | 7$^7$ | 2 | | | | | | | | | | | J Lehečka | 3 | 6 | 6 |
| 6 | M Cressy | 6 | 4 | 7$^7$ | | | | | | | | | | 2 | H Rune | 6 | 3 | 4 |
| Alt | G Blancaneaux | 3 | 6 | 6$^5$ | 6 | M Cressy | 0 | 6 | 6 | | | | | | | | | |
| | A Ritschard | 7$^7$ | 1 | 2 | | V Sachko | 6 | 1 | 1 | | | | | | | | | |
| | V Sachko | 6$^1$ | 6 | 6 | | | | | | 6 | M Cressy | 2 | 2 | | | | | |
| SE | H Moriya | 6$^5$ | 4 | | | | | | | 2 | H Rune | 6 | 6 | | | | | |
| Q | S Fanselow | 7$^7$ | 6 | | Q | S Fanselow | 2 | 2 | | | | | | | | | | |
| Alt | J Cagnina | 0 | 5 | | 2 | H Rune | 6 | 6 | | | | | | | | | | |
| 2 | H Rune | 6 | 7 | | | | | | | | | | | | | | | |