# 2012 Karshi Challenger – Singles

Denis Istomin was the defending champion, but chose not to compete. Igor Kunitsyn won the title, defeating Dzmitry Zhyrmont 7–6$^{(12–10)}$, 6–2 in the final.

## Seeds

* Igor Kunitsyn (champion)
* Dušan Lajović (quarterfinals)
* Konstantin Kravchuk (second round)
* Wu Di (semifinals)
* Ivan Sergeyev (semifinals)
* Illya Marchenko (first round)
* Kamil Čapkovič (quarterfinals)
* Brydan Klein (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 | Igor Kunitsyn | 6 | 6 | | | | | |
| 5 | Ivan Sergeyev | 3 | 1 | | | | | |
| 5 | Ivan Sergeyev | 3 | 1 | | 1 | Igor Kunitsyn | 7$^{12}$ | 6 |
| | | | | | Q | Dzmitry Zhyrmont | 6$^{10}$ | 2 |
| 4 | Wu Di | 6 | 2 | 1 | Q | Dzmitry Zhyrmont | 6$^{10}$ | 2 |
| Q | Dzmitry Zhyrmont | 3 | 6 | 6 | | | | |

### Top 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 |
| 1 | I Kunitsyn | 6 | 6 | | | | | | | | | | | | | |
| WC | S Ikramov | 1 | 4 | | 1 | I Kunitsyn | 7$^7$ | 6 | | | | | | | | |
| | F Dustov | 6 | 1 | 0 | | O Nedovyesov | 6$^2$ | 4 | | | | | | | | |
| | O Nedovyesov | 4 | 6 | 6 | | | | | 1 | I Kunitsyn | 6 | 6 | | | | |
| | S Diez | 6 | 7$^{10}$ | | | | | | | S Diez | 3 | 4 | | | | |
| | Nigmat Shofayziev | 0 | 6$^8$ | | | S Diez | 7$^7$ | 7 | | | | | | | | |
| LL | Jaan-Frederik Brunken | 6$^6$ | 6 | 6 | LL | J-F Brunken | 6$^4$ | 5 | | | | | | | | |
| 8 | B Klein | 7$^8$ | 2 | 0 | | | | | | | | | 1 | I Kunitsyn | 6 | 6 |
| 3 | K Kravchuk | 6 | 6 | | | | | | | | | | 5 | I Sergeyev | 3 | 1 |
| Q | N S Balaji | 3 | 1 | | 3 | K Kravchuk | 3 | 6$^5$ | | | | | | | | |
| | V Vardhan | 6 | 6 | | | V Vardhan | 6 | 7$^7$ | | | | | | | | |
| | Michal Konečný | 4 | 1 | | | | | | | V Vardhan | 6$^6$ | 5 | | | | |
| | T Chen | 2 | 1 | | | | | | 5 | I Sergeyev | 7$^8$ | 7 | | | | |
| | C Rungkat | 6 | 6 | | | C Rungkat | 4 | 4 | | | | | | | | |
| | A Martin | 6$^2$ | 1 | | 5 | I Sergeyev | 6 | 6 | | | | | | | | |
| 5 | I Sergeyev | 7$^7$ | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | K Čapkovič | 7 | 6 | | | | | | | | | | | | | | | | |
| WC | Temur Ismailov | 5 | 1 | | 7 | K Čapkovič | 7$^{11}$ | 2 | 6 | | | | | | | | | | |
| | Norbert Gomboš | 2 | 6 | 7$^9$ | | N Gomboš | 6$^9$ | 6 | 2 | | | | | | | | | | |
| | H Podlipnik-Castillo | 6 | 2 | 6$^7$ | | | | | | 7 | K Čapkovič | 2 | 6 | 3 | | | | | |
| | R Bellotti | 6 | 3 | | | | | | | 4 | D Wu | 6 | 3 | 6 | | | | | |
| | Nicolás Pastor | 0 | 0$^r$ | | | R Bellotti | 6 | 2 | 5 | | | | | | | | | | |
| WC | Sergey Shipilov | 0 | 2 | | 4 | D Wu | 4 | 6 | 7 | | | | | | | | | | |
| 4 | D Wu | 6 | 6 | | | | | | | | | | | | 4 | D Wu | 6 | 2 | 1 |
| 6 | I Marchenko | 6 | 5 | 4 | | | | | | | | | | | Q | D Zhyrmont | 3 | 6 | 6 |
| Q | D Zhyrmont | 2 | 7 | 6 | Q | D Zhyrmont | 6$^5$ | 6 | 5 | | | | | | | | | | |
| Q | D Matsukevich | 6 | 6 | | Q | D Matsukevich | 7$^7$ | 2 | 2$^r$ | | | | | | | | | | |
| | E Eleskovic | 3 | 1 | | | | | | | Q | D Zhyrmont | 6 | 6 | | | | | | |
| | G Melzer | 6 | 6 | | | | | | | 2 | D Lajović | 3 | 2 | | | | | | |
| | Y Uchiyama | 4 | 4 | | | G Melzer | 5 | 3 | | | | | | | | | | | |
| Q | Adrian Sikora | 6$^3$ | 4 | | 2 | D Lajović | 7 | 6 | | | | | | | | | | | |
| 2 | D Lajović | 7$^7$ | 6 | | | | | | | | | | | | | | | | |