| Date: | 14–20 October |
| Edition: | 19th |
| Surface: | Hard (indoor) |
| Location: | Saint-Brieuc, France |
| Champs: |  Benjamin Bonzi |
| Champd: | Geoffrey Blancaneaux / Gabriel Debru |
The 2024 Open Saint-Brieuc was a professional tennis tournament played on hard courts. It was the 19th edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Saint-Brieuc, France between 14 and 20 October 2024.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| France | Lucas Pouille | 125 | 1 | |
| France | Grégoire Barrère | 149 | 2 | |
| France | Titouan Droguet | 166 | 3 | |
| France | Benjamin Bonzi | 176 | 4 | |
| France | Valentin Royer | 182 | 5 | |
 United Kingdom | Paul Jubb | 186 | 6 | |
| France | Matteo Martineau | 204 | 7 | |
| France | Antoine Escoffier | 210 | 8 |
The following players received wildcards into the singles main draw:
Mathias Bourgue Sascha Gueymard Wayenburg Moïse KouaméThe following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
Kyle Edmund Lucas Poullain
Jiří VeselýThe following player received entry as a lucky loser:
See main article: 2024 Open Saint-Brieuc – Singles.
Benjamin Bonzi def. Lucas Pouille 6–2, 6–3.See main article: 2024 Open Saint-Brieuc – Doubles.
Geoffrey Blancaneaux / Gabriel Debru def. Jakub Paul / Matěj Vocel 3–3, defaulted.