# 2006 PBZ Zagreb Indoors – Singles

Ivan Ljubičić won the title, defeating Stefan Koubek 6–3, 6–4 in the final.

## Seeds

* Ivan Ljubičić (champion)
* David Ferrer (first round)
* Richard Gasquet (second round)
* Radek Štěpánek (second round)
* Mario Ančić (second round)
* Jarkko Nieminen (second round)
* Igor Andreev (first round)
* Feliciano López (second round)

## 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 |
| 1 | Ivan Ljubičić | 6$^6$ | 6 | 6 | | | | |
| | Novak Djokovic | 7$^8$ | 3 | 4 | | | | |
| | Novak Djokovic | 7$^8$ | 3 | 4 | 1 | Ivan Ljubičić | 6 | 6 |
| | | | | | Q | Stefan Koubek | 3 | 4 |
| | Tim Henman | 3 | 6 | 2 | Q | Stefan Koubek | 3 | 4 |
| Q | Stefan Koubek | 6 | 3 | 6 | | | | |

### Top 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 |
| 1 | I Ljubičić | 4 | 6 | 6 | | | | | | | | | | | | | | |
| WC | A Murray | 6 | 2 | 3 | 1 | I Ljubičić | 7$^7$ | 6 | | | | | | | | | | |
| | J Hernych | 2 | 4 | | | K Carlsen | 6$^5$ | 4 | | | | | | | | | | |
| | K Carlsen | 6 | 6 | | | | | | | 1 | I Ljubičić | 6 | 6 | | | | | |
| | T Zíb | 4 | 6 | 1 | | | | | | | M Youzhny | 3 | 2 | | | | | |
| | M Youzhny | 6 | 3 | 6 | | M Youzhny | 2 | 7$^7$ | 7$^7$ | | | | | | | | | |
| | P Starace | 6 | 5 | 3 | 6 | J Nieminen | 6 | 6$^3$ | 6$^0$ | | | | | | | | | |
| 6 | J Nieminen | 3 | 7 | 6 | | | | | | | | | | 1 | I Ljubičić | 6$^6$ | 6 | 6 |
| 4 | R Štěpánek | 6 | 7$^7$ | | | | | | | | | | | | N Djokovic | 7$^8$ | 3 | 4 |
| Q | T Cakl | 3 | 6$^2$ | | 4 | R Štěpánek | 3 | 4 | | | | | | | | | | |
| | N Djokovic | 6 | 7 | | | N Djokovic | 6 | 6 | | | | | | | | | | |
| | R Vik | 1 | 5 | | | | | | | | N Djokovic | 6 | 6 | | | | | |
| | D Bracciali | 4 | 6$^5$ | | | | | | | Q | I Bozoljac | 2 | 3 | | | | | |
| Q | I Bozoljac | 6 | 7$^7$ | | Q | I Bozoljac | 7$^7$ | 6 | | | | | | | | | | |
| | R Söderling | 6$^4$ | 6 | 1 | 8 | F López | 6$^5$ | 2 | | | | | | | | | | |
| 8 | F López | 7$^7$ | 4 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | I Andreev | 3 | 6 | 3 | | | | | | | | | | | | | | | |
| WC | M Čilić | 6 | 1 | 6 | WC | M Čilić | 6 | 4 | 4 | | | | | | | | | | |
| | A Seppi | 6 | 6 | | | A Seppi | 4 | 6 | 6 | | | | | | | | | | |
| Q | N Okun | 2 | 4 | | | | | | | | A Seppi | 3 | 4 | | | | | | |
| | A Clément | 3 | 3 | | | | | | | | T Henman | 6 | 6 | | | | | | |
| | T Henman | 6 | 6 | | | T Henman | 6 | 6 | | | | | | | | | | | |
| | D Sanguinetti | 3 | 0 | | WC/3 | R Gasquet | 4 | 4 | | | | | | | | | | | |
| WC/3 | R Gasquet | 6 | 6 | | | | | | | | | | | | | T Henman | 3 | 6 | 2 |
| 5 | M Ančić | 6 | 4 | 6 | | | | | | | | | | | Q | S Koubek | 6 | 3 | 6 |
| | D Tursunov | 3 | 6 | 4 | 5 | M Ančić | 6$^7$ | 6$^4$ | | | | | | | | | | | |
| | R Schüttler | 6$^0$ | 3 | | | I Karlović | 7$^9$ | 7$^7$ | | | | | | | | | | | |
| | I Karlović | 7$^7$ | 6 | | | | | | | | I Karlović | 6$^4$ | 7$^8$ | 3 | | | | | |
| Q | S Koubek | 7$^9$ | 3 | 6 | | | | | | Q | S Koubek | 7$^7$ | 6$^6$ | 6 | | | | | |
| | I Minář | 6$^7$ | 6 | 3 | Q | S Koubek | 6 | 6 | | | | | | | | | | | |
| | S Wawrinka | 4 | 6 | 6 | | S Wawrinka | 4 | 4 | | | | | | | | | | | |
| 2 | D Ferrer | 6 | 1 | 3 | | | | | | | | | | | | | | | |