# 2011 PBZ Zagreb Indoors – Singles

Marin Čilić was the two-time defending champion; however, he was eliminated by Florian Mayer in the quarterfinals. Ivan Dodig claimed the first ATP title of his career, by defeating Michael Berrer 6–3, 6–4 in the final match.

## Seeds

First four seeds received a bye into the second round.
* Marin Čilić (quarterfinals)
* Ivan Ljubičić (quarterfinals)
* Guillermo García-López (semifinals)
* Richard Gasquet (quarterfinals, retired)
* Florian Mayer (semifinals)
* Marcel Granollers (first round)
* Philipp Petzschner (second round)
* Michael Berrer (final)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 5 | Florian Mayer | 1 | 4 | | | | | |
| 8 | Michael Berrer | 6 | 6 | | | | | |
| 8 | Michael Berrer | 6 | 6 | | 8 | Michael Berrer | 3 | 4 |
| | | | | | | Ivan Dodig | 6 | 6 |
| 3 | Guillermo García-López | 6 | 6$^5$ | 4 | | Ivan Dodig | 6 | 6 |
| | Ivan Dodig | 4 | 7 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | M Čilić | 7 | 6 | | | | | | | | |
| | J Pospíšil | 3 | 2 | | | I Kunitsyn | 6$^3$ | 2 | | | | | | | | |
| | I Kunitsyn | 6 | 6 | | | | | | 1 | M Čilić | 3 | 4 | | | | |
| | R Štěpánek | 6 | 6 | | | | | | 5 | F Mayer | 6 | 6 | | | | |
| Q | S Koubek | 3 | 2 | | | R Štěpánek | 6$^2$ | 3 | | | | | | | | |
| WC | F Škugor | 6 | 3 | 6$^6$ | 5 | F Mayer | 7 | 6 | | | | | | | | |
| 5 | F Mayer | 3 | 6 | 7 | | | | | | | | | 5 | F Mayer | 1 | 4 |
| | | | | | | | | | | | | | 8 | M Berrer | 6 | 6 |
| | | | | | 4 | R Gasquet | w/o | | | | | | | | | |
| | A Clément | 6 | 6 | | | A Clément | | | | | | | | | | |
| | M Kukushkin | 4 | 2 | | | | | | 4 | R Gasquet | 2 | r | | | | |
| Q | B Kavčič | 6 | 7 | | | | | | 8 | M Berrer | 5 | | | | | |
| | M Zverev | 2 | 5 | | Q | B Kavčič | 4 | 1 | | | | | | | | |
| WC | N Mektić | 5 | 1 | | 8 | M Berrer | 6 | 6 | | | | | | | | |
| 8 | M Berrer | 7 | 6 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | P Petzschner | 6 | 6 | | | | | | | | | | | | | | | |
| | J Hájek | 3 | 3 | | 7 | P Petzschner | 1 | 2 | | | | | | | | | | |
| Q | A Bogomolov Jr. | 2 | 7 | 7 | Q | A Bogomolov Jr. | 6 | 6 | | | | | | | | | | |
| WC | A Veić | 6 | 6$^4$ | 6$^2$ | | | | | | Q | A Bogomolov Jr. | 2 | 6$^8$ | | | | | |
| | L Lacko | 4 | 6 | 7 | | | | | | 3 | G García-López | 6 | 7 | | | | | |
| | M İlhan | 6 | 4 | 5 | | L Lacko | 1 | 6 | 2 | | | | | | | | | |
| | | | | | 3 | G García-López | 6 | 2 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 3 | G García-López | 6 | 6$^5$ | 4 |
| 6 | M Granollers | 3 | 2 | | | | | | | | | | | | I Dodig | 4 | 7 | 6 |
| | I Dodig | 6 | 6 | | | I Dodig | 6 | 6 | | | | | | | | | | |
| | I Marchenko | 7 | 6 | | | I Marchenko | 2 | 3 | | | | | | | | | | |
| Q | D Lajović | 5 | 2 | | | | | | | | I Dodig | 6 | 6 | | | | | |
| | D Brands | 7 | 6$^2$ | 7 | | | | | | 2 | I Ljubičić | 4 | 4 | | | | | |
| | I Karlović | 5 | 7 | 6$^1$ | | D Brands | 2 | 3 | | | | | | | | | | |
| | | | | | 2 | I Ljubičić | 6 | 6 | | | | | | | | | | |