| Doubles | |
|---|---|
| 2020 L'Open 35 de Saint-Malo | |
| Champions |  Paula Kania Katarzyna Piter |
| Runners-up | Magdalena Fręch  Viktorija Golubic |
| Score | 6–2, 6–4 |
Ekaterine Gorgodze and Maryna Zanevska were the defending champions [1] but chose not to participate.
Paula Kania and Katarzyna Piter won the title, defeating Magdalena Fręch and Viktorija Golubic in the final, 6–2, 6–4.
Paula Kania / Katarzyna Piter (champions)
Ulrikke Eikeri / 
Mayar Sherif (quarterfinals, withdrew)
Irina Bara / 
Eva Guerrero Álvarez (quarterfinals)
Amandine Hesse / Harmony Tan (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | P Kania K Piter | 6 | 7 | ||||||||||||||||||||||||
| C Burel C Paquet | 77 | 6 | C Burel C Paquet | 2 | 5 | ||||||||||||||||||||||
 D Marcinkēviča  D Seguel | 61 | 4 | 1 | P Kania K Piter | 6 | 7 | |||||||||||||||||||||
| 3 | I Bara E Guerrero Álvarez | 6 | 5 | [10] |  E Kostova  V Lepchenko | 1 | 5 | ||||||||||||||||||||
 Y Hatouka A Kubareva | 3 | 7 | [8] | 3 | I Bara E Guerrero Álvarez | 3 | 5 | ||||||||||||||||||||
| E Kostova V Lepchenko | 6 | 6 | E Kostova V Lepchenko | 6 | 7 | ||||||||||||||||||||||
E Jacquemot  E Yashina | 0 | 3 | 1 | P Kania K Piter | 6 | 6 | |||||||||||||||||||||
| M Fręch V Golubic | 6 | 6 | M Fręch V Golubic | 2 | 4 | ||||||||||||||||||||||
F Brugnone  M Kostiuk | 2 | 2 | M Fręch V Golubic | 77 | 65 | [10] | |||||||||||||||||||||
| S Cakarevic M Yerolymos | 2 | 6 | [4] | 4 | A Hesse H Tan | 62 | 77 | [4] | |||||||||||||||||||
| 4 | A Hesse H Tan | 6 | 3 | [10] | M Fręch V Golubic | 3 | 6 | [10] | |||||||||||||||||||
| E Mazzoni J Mazzoni | 0 | 1 | C Bucșa  N Kostić | 6 | 4 | [8] | |||||||||||||||||||||
| C Bucșa N Kostić | 6 | 6 | C Bucșa N Kostić | w/o | |||||||||||||||||||||||
| A Albié M Partaud | 0 | 2 | 2 | U Eikeri M Sherif | |||||||||||||||||||||||
| 2 | U Eikeri M Sherif | 6 | 6 | ||||||||||||||||||||||||
Iveta Gerlová and Lucie Kriegsmannová were the defending champions, but both players chose not to participate.
Diana Enache and Daniëlle Harmsen were the defending champions, but lost in the quarterfinals to Paula Kania and Irina Khromacheva, 4–6, 5–7.
Monica Niculescu was the defending champion, but retired in the quarterfinals against Carla Suárez Navarro.
Klára Zakopalová won the title, defeating Garbiñe Muguruza in the final, 4–6, 7–5, 6–0.
Simona Halep was the defending champion, but she chose not to participate this year.
Eugenie Bouchard won her first career title, defeating Karolína Plíšková in the final, 6–2, 4–6, 6–3.
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Anabel Medina Garrigues and Arantxa Parra Santonja won the title, defeating Kiki Bertens and Johanna Larsson in the final, 6–0, 6–4.
Oksana Kalashnikova and Demi Schuurs were the defending champions, but Schuurs chose to compete in Gstaad instead. Kalashnikova played alongside Yaroslava Shvedova, but lost in the quarterfinals to Lenka Kunčíková and Karolína Stuchlá.
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Maja Chwalińska and Daria Kuczer were the defending champions, but chose to participate with different partners. Chwalińska played alongside Ulrikke Eikeri, while Kuczer partnered Stefania Rogozińska Dzik. The two teams played in the first round, with Chwalińska and Eikeri winning.
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