| 2011 Zagreb Open | |
|---|---|
| Date | May 9–16, 2011 |
| Edition | 16th (men) 4th (women) |
| Location | Zagreb, Croatia |
| Champions | |
| Men's singles | |
 Diego Junqueira | |
| Women's singles | |
 Nathalie Piquion | |
| Men's doubles | |
 Daniel Muñoz de la Nava / Rubén Ramírez Hidalgo | |
| Women's doubles | |
 Elitsa Kostova /  Barbara Sobaszkiewicz | |
The 2011 Zagreb Open (Also known as the Pliva Zagreb Open for sponsorship reasons) was a professional tennis tournament played on outdoor red clay courts. This event was the 16th edition of the tournament and was part of the 2011 ATP Challenger Tour and 2011 ITF Women's Circuit. It took place in Zagreb, Croatia May 9–16, 2011.