# 2025 Brazzaville Challenger – Singles

Gonzalo Oliveira was the defending champion but was unable to defend his title due to a suspension from professional tennis for methamphetamine use.
Geoffrey Blancaneaux won the title after defeating Calvin Hemery 6–3, 6–4 in the final.

## Seeds

* Calvin Hemery (final)
* Geoffrey Blancaneaux (champion)
* Max Houkes (quarterfinals)
* Maxime Chazal (second round)
* Guy den Ouden (second round)
* Eliakim Coulibaly (quarterfinals)
* Franco Agamenone (quarterfinals)
* Andrej Martin (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Calvin Hemery | 6 | 6 | | | | |
| | Maximus Jones | 1 | 4 | | | | |
| | Maximus Jones | 1 | 4 | 1 | Calvin Hemery | 3 | 4 |
| | | | | 2 | Geoffrey Blancaneaux | 6 | 6 |
| Alt | Dinko Dinev | 1 | 2 | 2 | Geoffrey Blancaneaux | 6 | 6 |
| 2 | Geoffrey Blancaneaux | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | C Hemery | 7$^7$ | 2 | 6 | | | | | | | | | |
| Alt | M Ymer | 6 | 6 | | Alt | M Ymer | 6$^5$ | 6 | 2 | | | | | | | | | |
| Alt | Julien De Cuyper | 3 | 2 | | | | | | | 1 | C Hemery | 6 | 6 | | | | | |
| Alt | Ezequiel Monferrer | 4 | 3 | | | | | | | 7 | F Agamenone | 3 | 3 | | | | | |
| | M Neuchrist | 6 | 6 | | | M Neuchrist | 4 | 1 | | | | | | | | | | |
| | Alec Beckley | 4 | 6 | 4 | 7 | F Agamenone | 6 | 6 | | | | | | | | | | |
| 7 | F Agamenone | 6 | 4 | 6 | | | | | | | | | | | 1 | C Hemery | 6 | 6 |
| 3 | M Houkes | 6 | 6 | | | | | | | | | | | | | M Jones | 1 | 4 |
| WC | Kryce-Didier Momo-Kassa | 0 | 0 | | 3 | M Houkes | 6 | 6 | | | | | | | | | | |
| Alt | Guelfo Borghini Baldovinetti | 1 | 3 | | Alt | R Alujas | 3 | 3 | | | | | | | | | | |
| Alt | Rodrigo Alujas | 6 | 6 | | | | | | | 3 | M Houkes | 6 | 3 | 1 | | | | |
| Alt | Matteo Covato | 1 | 5 | | | | | | | | M Jones | 2 | 6 | 6 | | | | |
| | Maximus Jones | 6 | 7 | | | M Jones | 7 | 3 | 7$^7$ | | | | | | | | | |
| WC | Nicholas van Aken | 0 | 0 | | 8 | A Martin | 5 | 6 | 6$^5$ | | | | | | | | | |
| 8 | A Martin | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | E Coulibaly | 6 | 1 | 6 | | | | | | | | | | | | | |
| | Maik Steiner | 3 | 6 | 4 | 6 | E Coulibaly | 6 | 1 | | | | | | | | | |
| | Credit Chaiyarin | 7$^9$ | 6 | | | C Chaiyarin | 2 | 0$^r$ | | | | | | | | | |
| | Jasza Szajrych | 6$^7$ | 2 | | | | | | 6 | E Coulibaly | 6 | 3 | 4 | | | | |
| WC | P Mamata | 7 | 1 | 2 | | | | | Alt | D Dinev | 3 | 6 | 6 | | | | |
| Alt | Dinko Dinev | 5 | 6 | 6 | Alt | D Dinev | 6 | 6 | | | | | | | | | |
| Alt | Yassine Smiej | 0 | 3 | | 4 | M Chazal | 4 | 4 | | | | | | | | | |
| 4 | M Chazal | 6 | 6 | | | | | | | | | | | Alt | D Dinev | 1 | 2 |
| 5 | G den Ouden | 6 | 6 | | | | | | | | | | | 2 | G Blancaneaux | 6 | 6 |
| Alt | Ivan Denisov | 1 | 3 | | 5 | G den Ouden | 4 | 4 | | | | | | | | | |
| Alt | PA Saraiva dos Santos | 6 | 6 | | Alt | PA Saraiva dos Santos | 6 | 6 | | | | | | | | | |
| Q | Dillon Beckles | 2 | 3 | | | | | | Alt | PA Saraiva dos Santos | 0 | 6 | 1 | | | | |
| | Dominik Kellovský | 5 | 6 | 6 | | | | | 2 | G Blancaneaux | 6 | 4 | 6 | | | | |
| | M Barreiros Reyes | 7 | 2 | 2 | | D Kellovský | 5 | 1 | | | | | | | | | |
| | Samir Hamza Reguig | 3 | 6$^3$ | | 2 | G Blancaneaux | 7 | 6 | | | | | | | | | |
| 2 | G Blancaneaux | 6 | 7$^7$ | | | | | | | | | | | | | | |