# 2011 Chang-Sat Bangkok Open – Singles

Grigor Dimitrov was the defending champion, but chose to play in the US Open instead. Cedrik-Marcel Stebe defeated Amir Weintraub 7–5, 6–1 to win the tournament.

## Seeds

* Rik de Voest (first round)
* Rainer Schüttler (second round)
* Teymuraz Gabashvili (second round)
* James Ward (quarterfinals)
* Cedrik-Marcel Stebe (champion)
* Konstantin Kravchuk (semifinals)
* Yuichi Sugita (second round)
* Amir Weintraub (final)

## 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 |
| 8 | Amir Weintraub | 6 | 6 | | | | |
| 6 | Konstantin Kravchuk | 4 | 2 | | | | |
| 6 | Konstantin Kravchuk | 4 | 2 | 8 | Amir Weintraub | 5 | 1 |
| | | | | 5 | Cedrik-Marcel Stebe | 7 | 6 |
| 5 | Cedrik-Marcel Stebe | 6 | 6 | 5 | Cedrik-Marcel Stebe | 7 | 6 |
| | Harri Heliövaara | 0 | 3 | | | | |

### Top half

| 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 |
| 1 | R de Voest | 4 | 1 | | | | | | | | | | | | | |
| | L Walter | 6 | 6 | | L Walter | 7$^7$ | 3 | 2 | | | | | | | | |
| Q | É Chvojka | 6 | 6 | Q | É Chvojka | 6$^3$ | 6 | 6 | | | | | | | | |
| Q | M Gong | 3 | 0 | | | | | | Q | É Chvojka | 4 | 5 | | | | |
| | H Moriya | 6 | 6 | | | | | | 8 | A Weintraub | 6 | 7 | | | | |
| | D Udomchoke | 3 | 1 | | H Moriya | 5 | 4 | | | | | | | | | |
| Q | R Ghedin | 3 | 0 | 8 | A Weintraub | 7 | 6 | | | | | | | | | |
| 8 | A Weintraub | 6 | 6 | | | | | | | | | | 8 | A Weintraub | 6 | 6 |
| 4 | J Ward | 6 | 6 | | | | | | | | | | 6 | K Kravchuk | 4 | 2 |
| | D Cox | 4 | 0 | 4 | J Ward | 7$^7$ | 6 | | | | | | | | | |
| | J Baker | 6 | 6 | | J Baker | 6$^4$ | 3 | | | | | | | | | |
| WC | K Wachiramanowong | 3 | 2 | | | | | | 4 | J Ward | 3 | 3 | | | | |
| | P-L Duclos | 6 | 6 | | | | | | 6 | K Kravchuk | 6 | 6 | | | | |
| WC | Kong Pop Lertchai | 1 | 2 | | P-L Duclos | 6$^5$ | 4 | | | | | | | | | |
| | T Chen | 3 | 3 | 6 | K Kravchuk | 7$^7$ | 6 | | | | | | | | | |
| 6 | K Kravchuk | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | C-M Stebe | 2 | 7$^8$ | 6 | | | | | | | | | | | | | |
| | N Monroe | 6 | 6$^6$ | 0 | 5 | C-M Stebe | 6 | 6 | | | | | | | | | |
| WC | P Siriluethaiwattana | 6 | 3 | 6 | WC | P Siriluethaiwattana | 4 | 3 | | | | | | | | | |
| | M Venus | 4 | 6 | 2 | | | | | | 5 | C-M Stebe | 6 | 6 | | | | |
| WC | Kirati Siributwong | 3 | 5 | | | | | | | | Y-k Lim | 3 | 2 | | | | |
| | Y-k Lim | 6 | 7 | | | Y-k Lim | 7 | 6 | | | | | | | | | |
| | J Milton | 2 | 2 | | 3 | T Gabashvili | 5 | 2 | | | | | | | | | |
| 3 | T Gabashvili | 6 | 6 | | | | | | | | | | | 5 | C-M Stebe | 6 | 6 |
| 7 | Y Sugita | 6 | 6 | | | | | | | | | | | | H Heliövaara | 0 | 3 |
| | R Klaasen | 4 | 3 | | 7 | Y Sugita | 3 | 6 | 6$^2$ | | | | | | | | |
| LL | Z Zhang | 4 | 5 | | Q | Z Li | 6 | 3 | 7$^7$ | | | | | | | | |
| Q | Z Li | 6 | 7 | | | | | | | Q | Z Li | 1 | 1 | | | | |
| | H Heliövaara | 1 | 6 | 6 | | | | | | | H Heliövaara | 6 | 6 | | | | |
| | F Dustov | 6 | 1 | 4 | | H Heliövaara | 6 | 4 | 7$^7$ | | | | | | | | |
| | A Ghem | 6 | 3 | 2 | 2 | R Schüttler | 4 | 6 | 6$^4$ | | | | | | | | |
| 2 | R Schüttler | 4 | 6 | 6 | | | | | | | | | | | | | |