The 2011 PBZ Zagreb Indoors was an ATP tennis tournament played on hard courts indoors. It was the 9th overall edition of the PBZ Zagreb Indoors, and was part of the ATP World Tour 250 series of the 2011 ATP World Tour. It took place in Zagreb, Croatia from January 30 through February 6, 2011.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Marin Čilić | 14 | 1 | ||
| Ivan Ljubičić | 16 | 2 | ||
 Spain | Guillermo García López | 32 | 3 | |
 France | Richard Gasquet | 33 | 4 | |
| Florian Mayer | 36 | 5 | ||
| Spain | Marcel Granollers | 42 | 6 | |
| Philipp Petzschner | 57 | 7 | ||
| Michael Berrer | 61 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2011 PBZ Zagreb Indoors – Singles qualifying.
See main article: 2011 PBZ Zagreb Indoors – Singles. Ivan Dodig def. Michael Berrer, 6–3, 6–4
See main article: 2011 PBZ Zagreb Indoors – Doubles. 
Dick Norman / 
Horia Tecău def. Marcel Granollers / Marc López, 6–3, 6–4
