| Singles | |
|---|---|
| 2021 Open du Pays d'Aix | |
| Champion |  Carlos Taberner |
| Runner-up |  Manuel Guinard |
| Score | 6–2, 6–2 |
Oscar Otte was the defending champion [1] but retired in the quarterfinals to Elias Ymer.
Carlos Taberner won the title after defeating Manuel Guinard 6–2, 6–2 in the final.
Roberto Carballés Baena (second round) Fernando Verdasco (first round)
Facundo Bagnis (second round) Francisco Cerúndolo (second round)
Juan Pablo Varillas (second round) Carlos Taberner (champion) Hugo Gaston (second round)
Sumit Nagal (first round)| Semifinals | Final | ||||||||||||
| Manuel Guinard | 6 | 6 | |||||||||||
 Elias Ymer | 4 | 2 | |||||||||||
| Manuel Guinard | 2 | 2 | |||||||||||
| 6 | Carlos Taberner | 6 | 6 | ||||||||||
| 6 | Carlos Taberner | 6 | 67 | 6 | |||||||||
| WC | Kyrian Jacquet | 3 | 79 | 0 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | R Carballés Baena | 6 | 6 | ||||||||||||||||||||||||
| WC | M Martineau | 3 | 1 | 1 | R Carballés Baena | 65 | 4 | ||||||||||||||||||||
| Q | N Sánchez Izquierdo | 6 | 3 | 4 | M Guinard | 77 | 6 | ||||||||||||||||||||
| M Guinard | 3 | 6 | 6 | M Guinard | 64 | 6 | 6 | ||||||||||||||||||||
 J Domingues | 62 | 4 | T Lamasine | 77 | 3 | 3 | |||||||||||||||||||||
 B Fratangelo | 77 | 6 | B Fratangelo | 5 | 3 | ||||||||||||||||||||||
| T Lamasine | 4 | 77 | 6 | T Lamasine | 7 | 6 | |||||||||||||||||||||
| 8 | S Nagal | 6 | 65 | 1 | M Guinard | 6 | 6 | ||||||||||||||||||||
| 4 | F Cerúndolo | 6 | 4 | 6 | E Ymer | 4 | 2 | ||||||||||||||||||||
| Alt | G Blancaneaux | 2 | 6 | 4 | 4 | F Cerúndolo | 79 | 2 | 4 | ||||||||||||||||||
| E Ymer | 6 | 77 | E Ymer | 67 | 6 | 6 | |||||||||||||||||||||
 M Viola | 4 | 63 | E Ymer | 6 | 0 | ||||||||||||||||||||||
 O Otte | 6 | 6 | O Otte | 0 | 0r | ||||||||||||||||||||||
| Q |  A Dougaz | 4 | 1 | O Otte | 6 | 4 | 6 | ||||||||||||||||||||
| T Robredo | 6 | 1 | 0 | 7 | H Gaston | 4 | 6 | 3 | |||||||||||||||||||
| 7 | H Gaston | 2 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | C Taberner | 6 | 6 | ||||||||||||||||||||||||
 A Vatutin | 4 | 1 | 6 | C Taberner | 77 | 6 | |||||||||||||||||||||
| WC | A Cazaux | 6 | 6 | WC | A Cazaux | 65 | 2 | ||||||||||||||||||||
| Alt | A Velotti | 3 | 0 | 6 | C Taberner | 6 | 6 | ||||||||||||||||||||
| R Olivo | 77 | 6 | R Olivo | 3 | 1 | ||||||||||||||||||||||
| LL |  Oscar José Gutierrez | 63 | 4 | R Olivo | 6 | 6 | |||||||||||||||||||||
| Alt | J Barranco Cosano | 3 | 6 | 1 | 3 | F Bagnis | 2 | 4 | |||||||||||||||||||
| 3 | F Bagnis | 6 | 1 | 6 | 6 | C Taberner | 6 | 67 | 6 | ||||||||||||||||||
| 5 | JP Varillas | 6 | 6 | WC | K Jacquet | 3 | 79 | 0 | |||||||||||||||||||
| A Collarini | 4 | 4 | 5 | JP Varillas | 4 | 3 | |||||||||||||||||||||
| M Janvier | 3 | 62 | WC | K Jacquet | 6 | 6 | |||||||||||||||||||||
| WC | K Jacquet | 6 | 77 | WC | K Jacquet | 7 | 6 | ||||||||||||||||||||
| Q | T Droguet | 6 | 6 | Q | T Droguet | 5 | 3 | ||||||||||||||||||||
| Q | O Roca Batalla | 3 | 4 | Q | T Droguet | 6 | 6 | ||||||||||||||||||||
| M Bourgue | 77 | 4 | 6 | M Bourgue | 4 | 1 | |||||||||||||||||||||
| 2 | F Verdasco | 63 | 6 | 2 | |||||||||||||||||||||||
Alexander Zverev was the defending champion, but chose not to participate this year.
Matteo Berrettini was the defending champion but chose not to defend his title.
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Fabio Fognini was the champion in 2014, when the event was last held, but chose to compete in Dubai instead.
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