# 2021 Engie Open Saint-Gaudens Occitanie – Singles

Anna Kalinskaya was the defending champion having won the previous edition in 2019, but chose not to participate.
Clara Burel won the title, defeating Alexandra Dulgheru in the final, 6–2, 1–6, 6–2.

## Seeds

* Viktorija Golubic (semifinals)
* Océane Dodin (first round)
* Kristína Kučová (quarterfinals)
* Kurumi Nara (quarterfinals)
* Barbara Haas (quarterfinals)
* Harmony Tan (withdrew)
* Clara Burel (champion)
* Cristina Bucșa (first round)
* Elena-Gabriela Ruse (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 | Final |
| 1 | Viktorija Golubic | 5 | 0 | | | | | | |
| PR | Alexandra Dulgheru | 7 | 6 | | | | | | |
| PR | Alexandra Dulgheru | 7 | 6 | | PR | Alexandra Dulgheru | 2 | 6 | 2 |
| | | | | | 7 | Clara Burel | 6 | 1 | 6 |
| 7 | Clara Burel | 6 | 6$^6$ | 6 | 7 | Clara Burel | 6 | 1 | 6 |
| Q | Anna Bondár | 3 | 7$^8$ | 3 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | V Golubic | 6 | 6 | | | | | | | | | | | | | | |
| Q | T Morderger | 4 | 4 | | 1 | V Golubic | 6 | 6 | | | | | | | | | |
| | I Shinikova | 3 | 5 | | Q | L Boisson | 2 | 4 | | | | | | | | | |
| Q | L Boisson | 6 | 7 | | | | | | 1 | V Golubic | 6$^2$ | 6 | 6 | | | | |
| Q | A Ramé | 3 | 1 | | | | | | | B Haddad Maia | 7$^7$ | 4 | 2 | | | | |
| Q | D Parry | 6 | 6 | | Q | D Parry | | | | | | | | | | | |
| | B Haddad Maia | 6 | 6 | | | B Haddad Maia | w/o | | | | | | | | | | |
| 8 | C Bucșa | 0 | 2 | | | | | | | | | | | 1 | V Golubic | 5 | 0 |
| 3 | K Kučová | 6 | 6 | | | | | | | | | | | PR | A Dulgheru | 7 | 6 |
| Q | T Andrianjafitrimo | 3 | 2 | | 3 | K Kučová | 6 | 6 | | | | | | | | | |
| JE | E Jacquemot | 5 | 3 | | LL | K Zimmermann | 2 | 4 | | | | | | | | | |
| LL | K Zimmermann | 7 | 6 | | | | | | 3 | K Kučová | 5 | 4 | | | | | |
| PR | A Dulgheru | 6 | 0 | | | | | | PR | A Dulgheru | 7 | 6 | | | | | |
| | LI Paar | 0 | 0$^r$ | | PR | A Dulgheru | 6 | 6 | | | | | | | | | |
| WC | A Droguet | 0 | 7$^{10}$ | 3 | 9 | E-G Ruse | 3 | 4 | | | | | | | | | |
| 9 | E-G Ruse | 6 | 6$^8$ | 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 | Semifinals |
| 7 | C Burel | 7 | 3 | 6 | | | | | | | | | | | | | | | |
| | M Bolkvadze | 5 | 6 | 4 | 7 | C Burel | 6$^6$ | 7$^7$ | 6 | | | | | | | | | | |
| Q | M Yerolymos | 6 | 2 | 6 | Q | M Yerolymos | 7$^8$ | 6$^0$ | 4 | | | | | | | | | | |
| | M Di Giuseppe | 2 | 6 | 3 | | | | | | 7 | C Burel | 7 | 6 | | | | | | |
| | D Aiava | 6 | 6 | | | | | | | 4 | K Nara | 5 | 2 | | | | | | |
| WC | M Gutiérrez Carrasco | 3 | 2 | | | D Aiava | 6 | 3 | 6$^6$ | | | | | | | | | | |
| | E-s Liang | 7$^{11}$ | 2 | 6$^5$ | 4 | K Nara | 4 | 6 | 7$^8$ | | | | | | | | | | |
| 4 | K Nara | 6$^9$ | 6 | 7$^7$ | | | | | | | | | | | 7 | C Burel | 6 | 6$^6$ | 6 |
| 5 | B Haas | 7$^7$ | 6 | | | | | | | | | | | | Q | A Bondár | 3 | 7$^8$ | 3 |
| WC | S Janicijevic | 6$^2$ | 1 | | 5 | B Haas | 6 | 6 | | | | | | | | | | | |
| WC | O Babel | 3 | 3 | | | J Grabher | 4 | 2 | | | | | | | | | | | |
| | J Grabher | 6 | 6 | | | | | | | 5 | B Haas | 1 | 7$^7$ | 3 | | | | | |
| Q | A Bondár | 6 | 6 | | | | | | | Q | A Bondár | 6 | 6$^4$ | 6 | | | | | |
| Q | K Gerlach | 3 | 3 | | Q | A Bondár | 6 | 3 | 7 | | | | | | | | | | |
| | C Paquet | 7 | 7 | | | C Paquet | 2 | 6 | 5 | | | | | | | | | | |
| 2 | O Dodin | 5 | 5 | | | | | | | | | | | | | | | | |