| 2009 Zagreb Open | |
|---|---|
| Date | May 11–17, 2009 |
| Edition | 14th |
| Location | Zagreb, Croatia |
| Champions | |
| Singles | |
 Marcos Daniel | |
| Doubles | |
 Peter Luczak /  Alessandro Motti | |
The 2009 Zagreb Open was a professional tennis tournament played on outdoor red clay courts. It was part of the 2009 ATP Challenger Tour. It took place in Zagreb, Croatia between May 11 and May 17, 2009.
| Nationality | Player | Ranking* | Seeding |
|---|---|---|---|
 FRA | Nicolas Devilder | 60 | 1 |
 USA | Robert Kendrick | 82 | 2 |
 ARG | Leonardo Mayer | 104 | 3 |
| ARG | Brian Dabul | 108 | 4 |
 CRO | Roko Karanušić | 111 | 5 |
| BRA | Thiago Alves | 119 | 6 |
| BRA | Marcos Daniel | 120 | 7 |
 CZE | Jiří Vaněk | 126 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Marcos Daniel def. 
Olivier Rochus, 6–3, 6–4
Peter Luczak / Alessandro Motti def. Brendan Evans / Ryan Sweeting, 6–4, 6–4
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