# 2025 Crete Challenger II – Singles

Edas Butvilas was the defending champion but chose not to defend his title.
Dimitar Kuzmanov won the title after defeating Federico Cinà 6–4, 6–2 in the final.

## Seeds

* Timofey Skatov (quarterfinals)
* Aslan Karatsev (semifinals)
* Khumoyun Sultanov (second round)
* Wu Tung-lin (second round)
* Marek Gengel (second round, retired)
* Chris Rodesch (quarterfinals)
* Zsombor Piros (withdrew)
* Lorenzo Giustino (first round)
* Rudolf Molleker (first round, retired)

## 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 |
| | Dimitar Kuzmanov | 6 | 7 | | | | |
| | Christoph Negritu | 3 | 5 | | | | |
| | Christoph Negritu | 3 | 5 | | Dimitar Kuzmanov | 6 | 6 |
| | | | | WC | Federico Cinà | 4 | 2 |
| WC | Federico Cinà | 6 | 6 | WC | Federico Cinà | 4 | 2 |
| 2 | Aslan Karatsev | 4 | 2 | | | | |

### 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 |
| 1 | T Skatov | 7$^7$ | 6 | | | | | | | | | | | | | | |
| Q | K Smith | 6$^2$ | 3 | | 1 | T Skatov | 6 | 6 | | | | | | | | | |
| | M Kližan | 4 | 2 | | Q | R Peniston | 4 | 4 | | | | | | | | | |
| Q | R Peniston | 6 | 6 | | | | | | | 1 | T Skatov | 4 | 3 | | | | |
| | D Kuzmanov | 6 | 6 | | | | | | | | D Kuzmanov | 6 | 6 | | | | |
| | A Géa | 3 | 3 | | | D Kuzmanov | 2 | 6 | 6 | | | | | | | | |
| Alt | G Fonio | 6 | 4 | | Alt | G Fonio | 6 | 3 | 4 | | | | | | | | |
| 9 | R Molleker | 4 | 0$^r$ | | | | | | | | | | | | D Kuzmanov | 6 | 7 |
| 4 | T-l Wu | 4 | 6 | 6 | | | | | | | | | | | C Negritu | 3 | 5 |
| SE | S Parker | 6 | 2 | 4 | 4 | T-l Wu | 5 | 4 | | | | | | | | | |
| | JC Prado Ángelo | 1 | 1 | | | D Novak | 7 | 6 | | | | | | | | | |
| | D Novak | 6 | 6 | | | | | | | | D Novak | 3 | 7$^7$ | 5 | | | |
| WC | S Sakellaridis | 7 | 6 | | | | | | | | C Negritu | 6 | 6$^3$ | 7 | | | |
| | N Sánchez Izquierdo | 5 | 3 | | WC | S Sakellaridis | 5 | 4 | | | | | | | | | |
| | C Negritu | 4 | 6 | 6 | | C Negritu | 7 | 6 | | | | | | | | | |
| 8 | L Giustino | 6 | 4 | 2 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | M Gengel | 7$^7$ | 6$^3$ | 6 | | | | | | | | | | | | |
| | M Rosenkranz | 6$^4$ | 7$^7$ | 4 | 5 | M Gengel | 6$^1$ | 2$^r$ | | | | | | | | |
| | E Kırkın | 7$^{11}$ | 7 | | | E Kırkın | 7$^7$ | 5 | | | | | | | | |
| | Andre Ilagan | 6$^9$ | 5 | | | | | | | E Kırkın | 5 | 4 | | | | |
| WC | F Cinà | 7 | 7$^7$ | | | | | | WC | F Cinà | 7 | 6 | | | | |
| Alt | Matthew Dellavedova | 5 | 6$^5$ | | WC | F Cinà | 7$^7$ | 6 | | | | | | | | |
| | R Berankis | 2 | 2 | | 3 | K Sultanov | 6$^3$ | 0 | | | | | | | | |
| 3 | K Sultanov | 6 | 6 | | | | | | | | | | WC | F Cinà | 6 | 6 |
| 6 | C Rodesch | 7 | 6 | | | | | | | | | | 2 | A Karatsev | 4 | 2 |
| Q | Marcello Serafini | 5 | 4 | | 6 | C Rodesch | 6 | 2 | | | | | | | | |
| Q | O Krutykh | 3 | 1 | | Q | K Samrej | 1 | 1$^r$ | | | | | | | | |
| Q | K Samrej | 6 | 6 | | | | | | 6 | C Rodesch | 2 | 5 | | | | |
| WC | Pavlos Tsitsipas | 1 | 2 | | | | | | 2 | A Karatsev | 6 | 7 | | | | |
| | Adrià Soriano Barrera | 6 | 6 | | | A Soriano Barrera | 3 | 3 | | | | | | | | |
| Q | M Topo | 3 | 4 | | 2 | A Karatsev | 6 | 6 | | | | | | | | |
| 2 | A Karatsev | 6 | 6 | | | | | | | | | | | | | |