# 2025 Thionville Open – Singles

This was the first edition of the tournament.
Borna Ćorić won the title after defeating Arthur Bouquier 6–4, 6–4 in the final.

## Seeds

* Borna Ćorić (champion)
* Alexander Blockx (first round)
* Luca Van Assche (quarterfinals, withdrew)
* Liam Draxl (quarterfinals)
* Yuta Shimizu (first round)
* Titouan Droguet (second round)
* Alibek Kachmazov (semifinals)
* Jan Choinski (quarterfinals)

## 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 | Semifinals | Final | Final | Final | Final |
| 1 | Borna Ćorić | 4 | 6 | 6 | | | | |
| 7 | Alibek Kachmazov | 6 | 4 | 3 | | | | |
| 7 | Alibek Kachmazov | 6 | 4 | 3 | 1 | Borna Ćorić | 6 | 6 |
| | | | | | | Arthur Bouquier | 4 | 4 |
| | Arthur Bouquier | 6$^2$ | 7$^7$ | 7$^7$ | | Arthur Bouquier | 4 | 4 |
| | Jurij Rodionov | 7$^7$ | 6$^5$ | 6$^5$ | | | | |

### 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 | Semifinals |
| 1 | B Ćorić | 6 | 6 | | | | | | | | | | | | | | | | |
| | P Jubb | 2 | 1 | | 1 | B Ćorić | 6 | 2 | | | | | | | | | | | |
| | E Ruusuvuori | 6 | 6 | | | E Ruusuvuori | 2 | 2$^r$ | | | | | | | | | | | |
| Q | Matisse Bobichon | 4 | 4 | | | | | | | 1 | B Ćorić | 6 | 6 | | | | | | |
| WC | T Paris | 2 | 7$^7$ | 6 | | | | | | | A Dougaz | 4 | 2 | | | | | | |
| | A Escoffier | 6 | 6$^5$ | 4 | WC | T Paris | 3 | 4 | | | | | | | | | | | |
| | A Dougaz | 6 | 6 | | | A Dougaz | 6 | 6 | | | | | | | | | | | |
| 5 | Y Shimizu | 4 | 3 | | | | | | | | | | | | 1 | B Ćorić | 4 | 6 | 6 |
| 4 | L Draxl | 6 | 6$^{10}$ | 6 | | | | | | | | | | | 7 | A Kachmazov | 6 | 4 | 3 |
| | N Budkov Kjær | 4 | 7$^{12}$ | 4 | 4 | L Draxl | 6 | 3 | 6 | | | | | | | | | | |
| | B Zhukayev | 7$^7$ | 6 | | | B Zhukayev | 3 | 6 | 3 | | | | | | | | | | |
| Alt | MH Rehberg | 6$^4$ | 1 | | | | | | | 4 | L Draxl | 6$^6$ | 7 | 2 | | | | | |
| WC | Felix Balshaw | 4 | 3 | | | | | | | 7 | A Kachmazov | 7$^8$ | 5 | 6 | | | | | |
| | B Hassan | 6 | 6 | | | B Hassan | 3 | 6 | 5 | | | | | | | | | | |
| | G Onclin | 2 | 3 | | 7 | A Kachmazov | 6 | 4 | 7 | | | | | | | | | | |
| 7 | A Kachmazov | 6 | 6 | | | | | | | | | | | | | | | | |

### Bottom 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | T Droguet | 4 | 6 | 6 | | | | | | | | | | | | | |
| Q | H Squire | 6 | 4 | 2 | 6 | T Droguet | 4 | 3 | | | | | | | | | |
| Q | Florian Broska | 3 | 4 | | | A Bouquier | 6 | 6 | | | | | | | | | |
| | A Bouquier | 6 | 6 | | | | | | | | A Bouquier | w/o | | | | | |
| WC | D Added | 7$^7$ | 6$^3$ | 3 | | | | | | 3 | L Van Assche | | | | | | |
| | M Martineau | 6$^5$ | 7$^7$ | 6 | | M Martineau | 1 | 6 | 3 | | | | | | | | |
| | H Grenier | 4 | 4 | | 3 | L Van Assche | 6 | 3 | 6 | | | | | | | | |
| 3 | L Van Assche | 6 | 6 | | | | | | | | | | | A Bouquier | 6$^2$ | 7$^7$ | 7$^7$ |
| 8 | J Choinski | 6 | 6 | | | | | | | | | | | J Rodionov | 7$^7$ | 6$^5$ | 6$^5$ |
| Q | P Henning | 4 | 3 | | 8 | J Choinski | 6 | 6 | | | | | | | | | |
| Alt | D Yevseyev | 4 | 6 | 4 | | S Gueymard Wayenburg | 3 | 1 | | | | | | | | | |
| | S Gueymard Wayenburg | 6 | 2 | 6 | | | | | | 8 | J Choinski | 2 | 4 | | | | |
| | J Rodionov | 6 | 6 | | | | | | | | J Rodionov | 6 | 6 | | | | |
| Q | V Sachko | 2 | 2 | | | J Rodionov | 6 | 6 | | | | | | | | | |
| Q | J Paul | 6 | 7$^7$ | | Q | J Paul | 3 | 1 | | | | | | | | | |
| 2 | A Blockx | 1 | 6$^5$ | | | | | | | | | | | | | | |