| 2024 Open de Rennes | |
|---|---|
| Date | 9–15 September |
| Edition | 18th |
| Surface | Hard (Indoor) |
| Location | Rennes, France |
| Champions | |
| Singles | |
 Jacob Fearnley | |
| Doubles | |
 Sander Arends /  Grégoire Jacq | |
The 2024 Open de Rennes was a professional tennis tournament played on hard courts. It was the 18th edition of the tournament and part of the 2024 ATP Challenger Tour. It took place in Rennes, France between 9 and 15 September 2024.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| FRA | Adrian Mannarino | 42 | 1 |
| FRA | Constant Lestienne | 111 | 2 |
| FRA | Harold Mayot | 113 | 3 |
| FRA | Quentin Halys | 119 | 4 |
| FRA | Benjamin Bonzi | 129 | 5 |
| FRA | Titouan Droguet | 146 | 6 |
| FRA | Lucas Pouille | 147 | 7 |
| GBR | Jacob Fearnley | 158 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
Jacob Fearnley def. Quentin Halys 0–6, 7–6(7–5), 6–3. Sander Arends / Grégoire Jacq def. Antoine Escoffier / Joshua Paris 6–4, 6–2.
