| 2026 Brest Challenger | |
|---|---|
| Date | 26 October – 1 November |
| Edition | 11th |
| Surface | Hard (indoor) |
| Location | Brest, France |
| Champions | |
| Singles | |
| Doubles | |
The 2026 Brest Open Groupe Vert was a professional tennis tournament played on hard courts. It was the 11th edition of the tournament which was part of the 2026 ATP Challenger Tour. It took place in Brest, France between 26 October and 1 November 2026.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| Hugo Gaston | 93 | 1 | |
| Dino Prižmić | 95 | 2 | |
| Toby Samuel | 96 | 3 | |
| Zsombor Piros | 103 | 4 | |
| Martin Damm | 107 | 5 | |
| Otto Virtanen | 121 | 6 | |
| Shintaro Mochizuki | 129 | 7 | |
| Nishesh Basavareddy | 134 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw as special exempts:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser: