The 2011 Singapore ATP Challenger was a professional tennis tournament played on hard courts. It was the first edition of the tournament which was part of the 2011 ATP Challenger Tour. It took place in Singapore between 24 and 30 January 2011.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 India | Somdev Devvarman | 108 | 1 | |
 Japan | Go Soeda | 119 | 2 | |
 Italy | Paolo Lorenzi | 140 | 3 | |
 Russian Federation | Alexander Kudryavtsev | 147 | 4 | |
 Czech Republic | Lukáš Rosol | 162 | 5 | |
| Czech Republic | Ivo Minář | 168 | 6 | |
 Brazil | Thiago Alves | 169 | 7 | |
 Slovakia | Andrej Martin | 177 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2011 Singapore ATP Challenger – Singles. Dmitry Tursunov def. Lukáš Rosol, 6–4, 6–2
See main article: 2011 Singapore ATP Challenger – Doubles. 
Scott Lipsky / David Martin def. 
Sanchai Ratiwatana / Sonchat Ratiwatana, 5–7, 6–1, [10–8]
