# 2023 Saturn Oil Open – Singles

Lukáš Klein was the defending champion but lost in the second round to Ivan Gakhov.
Gakhov won the title after defeating Frederico Ferreira Silva 6–2, 5–7, 6–3 in the final.

## Seeds

* Pavel Kotov (semifinals)
* Zsombor Piros (first round)
* Zizou Bergs (withdrew)
* Lukáš Klein (second round)
* Filip Misolic (first round)
* Jozef Kovalík (first round)
* Kaichi Uchida (first round)
* Jelle Sels (first 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 | Semifinals | Final | Final | Final | Final |
| 1 | Pavel Kotov | 7$^7$ | 1 | 1 | | | | |
| | Ivan Gakhov | 6$^5$ | 6 | 6 | | | | |
| | Ivan Gakhov | 6$^5$ | 6 | 6 | Ivan Gakhov | 6 | 5 | 6 |
| | | | | | Frederico Ferreira Silva | 2 | 7 | 3 |
| LL | Sumit Nagal | 2 | 6 | 4 | Frederico Ferreira Silva | 2 | 7 | 3 |
| | Frederico Ferreira Silva | 6 | 3 | 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 | Semifinals |
| 1 | P Kotov | 3 | 7$^7$ | 6 | | | | | | | | | | | | | | | |
| | J De Loore | 6 | 6$^5$ | 1 | 1 | P Kotov | 6 | 6 | | | | | | | | | | | |
| Q | T Atmane | 6 | 7$^7$ | | Q | T Atmane | 2 | 2 | | | | | | | | | | | |
| | Y-h Hsu | 1 | 6$^3$ | | | | | | | 1 | P Kotov | 2 | 6 | 6 | | | | | |
| Alt | H Casanova | 6 | 6 | | | | | | | Q | R Strombachs | 6 | 3 | 4 | | | | | |
| LL | Constantin Bittoun Kouzmine | 2 | 4 | | Alt | H Casanova | 4 | 0 | | | | | | | | | | | |
| Q | R Strombachs | 7 | 7$^7$ | | Q | R Strombachs | 6 | 6 | | | | | | | | | | | |
| 6 | J Kovalík | 5 | 6$^5$ | | | | | | | | | | | | 1 | P Kotov | 7$^7$ | 1 | 1 |
| 4 | L Klein | 6 | 6$^2$ | 6 | | | | | | | | | | | | I Gakhov | 6$^5$ | 6 | 6 |
| WC | M Topo | 3 | 7$^7$ | 4 | 4 | L Klein | 4 | 2 | | | | | | | | | | | |
| | I Gakhov | 6 | 6 | | | I Gakhov | 6 | 6 | | | | | | | | | | | |
| Q | O Roca Batalla | 2 | 0 | | | | | | | | I Gakhov | 3 | 7$^7$ | 7$^7$ | | | | | |
| Q | N Hardt | 4 | 7$^7$ | 6 | | | | | | Q | N Hardt | 6 | 6$^3$ | 6$^4$ | | | | | |
| | C-h Tseng | 6 | 6$^2$ | 2 | Q | N Hardt | 6 | 1 | 7$^7$ | | | | | | | | | | |
| WC | M Moraing | 6 | 6 | | WC | M Moraing | 2 | 6 | 6$^4$ | | | | | | | | | | |
| 8 | J Sels | 2 | 3 | | | | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | F Misolic | 5 | 6 | 4 | | | | | | | | | | | | | | | |
| LL | K Friberg | 7 | 4 | 6 | LL | K Friberg | 6 | 1 | 4 | | | | | | | | | | |
| | A Çelikbilek | 0 | 4 | | | O Krutykh | 1 | 6 | 6 | | | | | | | | | | |
| | O Krutykh | 6 | 6 | | | | | | | | O Krutykh | 1 | 6 | 4 | | | | | |
| | D Kuzmanov | 3 | 6 | 5 | | | | | | LL | S Nagal | 6 | 1 | 6 | | | | | |
| LL | S Nagal | 6 | 1 | 7 | LL | S Nagal | w/o | | | | | | | | | | | | |
| | J Choinski | 6 | 6 | | | J Choinski | | | | | | | | | | | | | |
| Q | J Pereira | 4 | 3 | | | | | | | | | | | | LL | S Nagal | 2 | 6 | 4 |
| 7 | K Uchida | 3 | 3 | | | | | | | | | | | | | F Ferreira Silva | 6 | 3 | 6 |
| Q | B Hassan | 6 | 6 | | Q | B Hassan | 3 | 6 | 2 | | | | | | | | | | |
| | F Ferreira Silva | 6 | 3 | 6 | | F Ferreira Silva | 6 | 3 | 6 | | | | | | | | | | |
| Alt | H Laaksonen | 3 | 6 | 1 | | | | | | | F Ferreira Silva | 6 | 6 | | | | | | |
| WC | H Squire | 2 | 5 | | | | | | | LL | R Olivo | 3 | 2 | | | | | | |
| LL | R Olivo | 6 | 7 | | LL | R Olivo | 6 | 3 | 6 | | | | | | | | | | |
| | S-c Hong | 3 | 6 | 6 | | S-c Hong | 3 | 6 | 4 | | | | | | | | | | |
| 2 | Z Piros | 6 | 0 | 0 | | | | | | | | | | | | | | | |