The 2011 Malaysian Open (also known as the 2011 Proton Malaysian Open' for sponsorship reasons) was a men's tennis tournament played on indoor hard courts. It was the third edition of the Proton Malaysian Open, and was classified as an ATP World Tour 250 Series of the 2011 ATP World Tour. It took place at the Bukit Jalil Sports Complex in Kuala Lumpur, Malaysia. Janko Tipsarević won the singles title.
See main article: 2011 Proton Malaysian Open – Singles. 
Janko Tipsarević defeated 
Marcos Baghdatis, 6–4, 7–5
See main article: 2011 Proton Malaysian Open – Doubles. 
Eric Butorac / Jean-Julien Rojer defeated 
František Čermák / 
Filip Polášek, 6–1, 6–3
| width=70 | Country | width=175 | Player | Rank | Seed |
|---|---|---|---|---|---|
 Spain | Nicolás Almagro | 12 | 1 | ||
| Serbia | Viktor Troicki | 16 | 2 | ||
| Serbia | Janko Tipsarević | 17 | 3 | ||
 Austria | Jürgen Melzer | 21 | 4 | ||
 Russian Federation | Nikolay Davydenko | 36 | 5 | ||
| United States | Alex Bogomolov Jr. | 40 | 6 | ||
| Russian Federation | Dmitry Tursunov | 41 | 7 | ||
 Japan | Kei Nishikori | 54 | 8 |
The following players received wildcards into the singles main draw
The following players received entry from the qualifying draw:
