# 2012 Chang-Sat Bangkok Open – Singles

Cedrik-Marcel Stebe was the defending champion but chose to participate at the 2012 US Open instead. Dudi Sela won the final 6–1, 7–5 against Yuichi Sugita.

## Seeds

* Dudi Sela (champion)
* Danai Udomchoke (first round)
* Yuichi Sugita (final)
* Zhang Ze (quarterfinals)
* Amir Weintraub (second round)
* Chen Ti (first round)
* James Ward (second round)
* Harri Heliövaara (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 | Final | Final | Final | Final |
| 1 | Dudi Sela | 6 | 6 | | | | |
| Q | Christopher Rungkat | 3 | 1 | | | | |
| Q | Christopher Rungkat | 3 | 1 | 1 | Dudi Sela | 6 | 7 |
| | | | | 3 | Yuichi Sugita | 1 | 5 |
| 3 | Yuichi Sugita | 6 | 6 | 3 | Yuichi Sugita | 1 | 5 |
| | Maoxin Gong | 1 | 3 | | | | |

### 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 |
| 1 | D Sela | 7 | 6 | | | | | | | | | | | | | | | |
| WC | P Siriluethaiwattana | 5 | 2 | | 1 | D Sela | 6 | 6 | | | | | | | | | | |
| Q | K Takeuchi | 2 | 1 | | WC | K Wachiramanowong | 0 | 2 | | | | | | | | | | |
| WC | K Wachiramanowong | 6 | 6 | | | | | | | 1 | D Sela | 6 | 6 | | | | | |
| | J Millman | 6 | | | | | | | | | J Millman | 4 | 4 | | | | | |
| | D Molchanov | 5$^r$ | | | | J Millman | 6 | 3 | 7 | | | | | | | | | |
| WC | W Sornbutnark | 1 | 0 | | 7 | J Ward | 3 | 6 | 5 | | | | | | | | | |
| 7 | J Ward | 6 | 6 | | | | | | | | | | | | 1 | D Sela | 6 | 6 |
| 4 | Z Zhang | 3 | 6 | 7 | | | | | | | | | | | Q | C Rungkat | 3 | 1 |
| Q | H Srugo | 6 | 0 | 5 | 4 | Z Zhang | 6 | 6 | | | | | | | | | | |
| Q | S-y Jeong | 6 | 6 | | Q | S-y Jeong | 4 | 4 | | | | | | | | | | |
| | J Statham | 2 | 4 | | | | | | | 4 | Z Zhang | 6 | 4 | 4 | | | | |
| Q | C Rungkat | 2 | 6 | 7$^7$ | | | | | | Q | C Rungkat | 3 | 6 | 6 | | | | |
| | T Matsui | 6 | 2 | 6$^3$ | Q | C Rungkat | 6 | 6 | | | | | | | | | | |
| | I Klec | 6 | 7 | | | I Klec | 2 | 0 | | | | | | | | | | |
| 6 | T Chen | 3 | 5 | | | | | | | | | | | | | | | |

### 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 | A Weintraub | 6$^4$ | 6 | 6 | | | | | | | | | | | | | |
| | Stefan Seifert | 7$^7$ | 3 | 3 | 5 | A Weintraub | 4 | 6 | 6$^6$ | | | | | | | | |
| WC | Kong Pop Lertchai | 2 | 4 | | | M Reid | 6 | 4 | 7$^8$ | | | | | | | | |
| | M Reid | 6 | 6 | | | | | | | | M Reid | 2 | 2 | | | | |
| | L Vanni | 6 | 6 | | | | | | | 3 | Y Sugita | 6 | 6 | | | | |
| | D King-Turner | 2 | 3 | | | L Vanni | 3 | 2 | | | | | | | | | |
| | N Gombos | 1 | 3 | | 3 | Y Sugita | 6 | 6 | | | | | | | | | |
| 3 | Y Sugita | 6 | 6 | | | | | | | | | | | 3 | Y Sugita | 6 | 6 |
| 8 | H Heliövaara | 3 | 6 | 2 | | | | | | | | | | | M-X Gong | 1 | 3 |
| | K Krawietz | 6 | 2 | 6 | | K Krawietz | 1 | 1 | | | | | | | | | |
| | L Huang | 6 | 4 | 6 | | L Huang | 6 | 6 | | | | | | | | | |
| | G Jones | 4 | 6 | 3 | | | | | | | L Huang | 4 | 2 | | | | |
| | Y Uchiyama | 7$^9$ | 7$^7$ | | | | | | | | M-X Gong | 6 | 6 | | | | |
| | V Vardhan | 6$^7$ | 6$^2$ | | | Y Uchiyama | 5 | 3 | | | | | | | | | |
| | M-X Gong | 7$^7$ | 4 | | | M-X Gong | 7 | 6 | | | | | | | | | |
| 2 | D Udomchoke | 6$^4$ | 1$^r$ | | | | | | | | | | | | | | |