| 2025 Crete Challenger IV | |
|---|---|
| Date | 18 – 23 August |
| Edition | 4th |
| Surface | Hard |
| Location | Hersonissos, Greece |
| Champions | |
| Singles | |
 Moez Echargui | |
| Doubles | |
 Mats Rosenkranz /  Harry Wendelken | |
The 2025 Crete Challenger IV was a professional tennis tournament played on hard courts. It was the fourth edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Hersonissos, Greece between 18 and 23 August 2025.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| TUN | Moez Echargui | 211 | 1 |
 CZE | Marek Gengel | 250 | 2 |
 FRA | Matteo Martineau | 269 | 3 |
 SUI | Jakub Paul | 295 | 4 |
 GRE | Stefanos Sakellaridis | 317 | 5 |
| FRA | Robin Bertrand | 323 | 6 |
| FRA | Dan Added | 340 | 7 |
 USA | Christian Langmo | 351 | 8 |
The following players received wildcards into the singles main draw:
Dimitris Azoidis Pavlos Tsitsipas Ioannis XilasThe following player received entry into the singles main draw using a protected ranking:
The following player received entry into the singles main draw through the College Accelerator programme:
Jay Dylan Hara FriendThe following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
Pietro Fellin Massimo Giunta Filippo Moroni Luca Potenza Enzo Wallart Harry Wendelken The following player received entry as a lucky loser:
Luca Castagnola Moez Echargui def. Dan Added 5–7, 6–4, 3–0 ret. Mats Rosenkranz / Harry Wendelken def. 
Victor Vlad Cornea / 
Patrik Niklas-Salminen 4–6, 6–4, [10–7].