Tennis at the 2011 Southeast Asian Games – Men's singles
# Tennis at the 2011 Southeast Asian Games – Men's singles

Cecil Mamiit is the defending champion of the Men's Singles competition of the 2011 Southeast Asian Games but lost in the semifinals to Christopher Rungkat. Rungkat won the title by beating top seed Danai Udomchoke 6–2, 6–2 in the final.

## Medalists

| Event | Gold | Silver | Bronze |
| - | - | - | - |
| Men's Singles | Indonesia Christopher Rungkat | Thailand Danai Udomchoke | Indonesia Elbert Sie |
| Men's Singles | Indonesia Christopher Rungkat | Thailand Danai Udomchoke | Philippines Cecil Mamiit |

## Draw

### Seeds

The top seed received bye to the quarterfinals.

* Danai Udomchoke (final)
* Christopher Rungkat (champion)
* Kittiphong Wachiramanowong (quarterfinals)
* Elbert Sie (semifinals)

### Main draw

| First round | First round | First round | First round | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Gold Medal Match | Gold Medal Match | Gold Medal Match | Gold Medal Match |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 1 | Danai Udomchoke | 6 | 6 | | | | | | | | | | |
| | Lasavady Vitata | 2 | 5 | | | Do Minh Quan | 2 | 1 | | | | | | | | | | |
| | Do Minh Quan | 6 | 7 | | | | | | | 1 | Danai Udomchoke | 6 | 6 | | | | | |
| 4 | Elbert Sie | 6 | 7 | | | | | | | 4 | Elbert Sie | 2 | 1 | | | | | |
| | Aung Kyaw Naing | 0 | 5 | | 4 | Elbert Sie | 6 | 6 | | | | | | | | | | |
| | Jeson Petrombon | 6 | 6 | | | Jeson Petrombon | 4 | 1 | | | | | | | | | | |
| | Long Samneang | 0 | 1 | | | | | | | | | | | | 1 | Danai Udomchoke | 2 | 2 |
| | Nguyen Hoang Thien | 2 | 6 | 3 | | | | | | | | | | | 2 | Christopher Rungkat | 6 | 6 |
| | Cecil Mamiit | 6 | 2 | 6 | | Cecil Mamiit | 3 | 6 | 6 | | | | | | | | | |
| | Phyo Min Thar | 0 | 1 | | 3 | Kittipong Wachiramanowong | 6 | 3 | 3 | | | | | | | | | |
| 3 | Kittipong Wachiramanowong | 6 | 6 | | | | | | | | Cecil Mamiit | 2 | 6 | $6^6$ | | | | |
| | Si Yew Ming | 6 | 6 | | | | | | | 2 | Christopher Rungkat | 6 | 4 | $7^7$ | | | | |
| | Keodalasouk D | 2 | 1 | | | Si Yew Ming | 3 | 2 | | | | | | | | | | |
| | Kenny Bun | 4 | $6^3$ | | 2 | Christopher Rungkat | 6 | 6 | | | | | | | | | | |
| 2 | Christopher Rungkat | 6 | $7^7$ | | | | | | | | | | | | | | | |
