# 2011 Karshi Challenger – Singles

Blaž Kavčič was the defending champion. He reached the final but Denis Istomin defeated him 6–3, 1–6, 6–1 and won the title.

## Seeds

* Blaž Kavčič (final)
* Denis Istomin (champion)
* Konstantin Kravchuk (semifinals)
* Alexander Kudryavtsev (quarterfinals)
* Andrej Martin (second round)
* Yang Tsung-hua (second round)
* Farrukh Dustov (quarterfinals, retired due right shoulder injury)
* Ivo Klec (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 | Final |
| 1 | Blaž Kavčič | 6 | 5 | 6 | | | | | |
| Q | Mikhail Ledovskikh | 3 | 7 | 4 | | | | | |
| Q | Mikhail Ledovskikh | 3 | 7 | 4 | 1 | Blaž Kavčič | 3 | 6 | 1 |
| | | | | | 2/SE | Denis Istomin | 6 | 1 | 6 |
| 3 | Konstantin Kravchuk | 6$^8$ | 3 | | 2/SE | Denis Istomin | 6 | 1 | 6 |
| 2/SE | Denis Istomin | 7$^{10}$ | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | B Kavčič | 6 | 7 | | | | | | | | | | | | | | | |
| | M Semjan | 2 | 5 | | 1 | B Kavčič | 6 | 6 | | | | | | | | | | |
| | R Klaasen | 4 | 6$^5$ | | WC | M Inoyatov | 2 | 2 | | | | | | | | | | |
| WC | M Inoyatov | 6 | 7$^7$ | | | | | | | 1 | B Kavčič | 6 | 4 | | | | | |
| | A Smirnov | 6 | 1 | 6$^4$ | | | | | | 7/WC | F Dustov | 4 | 0$^r$ | | | | | |
| | L Recouderc | 2 | 6 | 7$^7$ | | L Recouderc | 5 | 2 | | | | | | | | | | |
| | V Vardhan | 4 | 7 | 4 | 7/WC | F Dustov | 7 | 6 | | | | | | | | | | |
| 7/WC | F Dustov | 6 | 5 | 6 | | | | | | | | | | 1 | B Kavčič | 6 | 5 | 6 |
| 4 | A Kudryavtsev | 6 | 4 | | | | | | | | | | | Q | M Ledovskikh | 3 | 7 | 4 |
| | M Mečíř Jr. | 4 | 0$^r$ | | 4 | A Kudryavtsev | 6 | 7$^8$ | | | | | | | | | | |
| | R Albot | 7 | 7$^7$ | | | R Albot | 0 | 6$^6$ | | | | | | | | | | |
| | K Rastogi | 5 | 6$^3$ | | | | | | | 4 | A Kudryavtsev | 3 | 4 | | | | | |
| Q | M Ledovskikh | 3 | 7$^7$ | 6 | | | | | | Q | M Ledovskikh | 6 | 6 | | | | | |
| | Mikhail Vasiliev | 6 | 6$^5$ | 2 | Q | M Ledovskikh | 6$^2$ | 6 | 6 | | | | | | | | | |
| Q | S Ikramov | 4 | 4 | | 5 | A Martin | 7$^7$ | 1 | 3 | | | | | | | | | |
| 5 | A Martin | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | I Klec | 6$^3$ | 5 | | | | | | | | | | | | | | | |
| | D Molchanov | 7$^7$ | 7 | | | D Molchanov | 6 | 3 | 6 | | | | | | | | | |
| LL | Junn Mitsuhashi | 3 | 1 | | WC | C Rungkat | 1 | 6 | 4 | | | | | | | | | |
| WC | C Rungkat | 6 | 6 | | | | | | | | D Molchanov | 6 | 4 | 1 | | | | |
| Q | G Melzer | 3 | 4 | | | | | | | 3 | K Kravchuk | 4 | 6 | 6 | | | | |
| | A Menéndez | 6 | 6 | | | A Menéndez | 6$^2$ | 5 | | | | | | | | | | |
| | T Chen | 6$^5$ | 6$^8$ | | 3 | K Kravchuk | 7$^7$ | 7 | | | | | | | | | | |
| 3 | K Kravchuk | 7$^7$ | 7$^8$ | | | | | | | | | | | | 3 | K Kravchuk | 6$^8$ | 3 |
| 6 | T-h Yang | 6 | 6 | | | | | | | | | | | | 2/SE | D Istomin | 7$^{10}$ | 6 |
| | J Minář | 3 | 1 | | 6 | T-h Yang | 2 | 2 | | | | | | | | | | |
| | D Lajović | 6 | 5 | | | D Lajović | 6 | 6 | | | | | | | | | | |
| WC | Nigmat Shofayziev | 2 | 0$^r$ | | | | | | | | D Lajović | 3 | 0 | | | | | |
| | L Walter | 6 | 1 | 2 | | | | | | 2/SE | D Istomin | 6 | 6 | | | | | |
| Q | M Elgin | 4 | 6 | 6 | Q | M Elgin | 3 | 1 | | | | | | | | | | |
| | D Evans | 1 | 0 | | 2/SE | D Istomin | 6 | 6 | | | | | | | | | | |
| 2/SE | D Istomin | 6 | 6 | | | | | | | | | | | | | | | |