# 2006 St. Petersburg Open – Singles

Thomas Johansson was the defending champion.
Mario Ančić won the title, beating Johansson 7–5, 7–6$^{(7–2)}$ in the final.

## Seeds

* Nikolay Davydenko (second round, retired because of a foot injury)
* Tommy Robredo (first round)
* Mario Ančić (champion)
* Tommy Haas (second round)
* Jarkko Nieminen (second round, retired because of a left foot injury)
* Dmitry Tursunov (first round)
* Mikhail Youzhny (second round, withdrew because of an ankle injury)
* Jürgen Melzer (first 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 | Final | Final | Final | Final |
| | Thomas Johansson | 6 | 7$^7$ | | | | |
| WC | Igor Kunitsyn | 3 | 6$^3$ | | | | |
| WC | Igor Kunitsyn | 3 | 6$^3$ | | Thomas Johansson | 5 | 6$^2$ |
| | | | | 3 | M Ančić | 7 | 7$^7$ |
| 3 | Mario Ančić | 6 | 6 | 3 | M Ančić | 7 | 7$^7$ |
| WC | Ernests Gulbis | 2 | 3 | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | N Davydenko | 6 | 6 | | | | | | | | | | | | | | | |
| | F Santoro | 3 | 1 | | 1 | N Davydenko | 6 | 3$^r$ | | | | | | | | | | |
| | W Moodie | 2 | 7 | 6 | | W Moodie | 2 | 3 | | | | | | | | | | |
| WC | T Gabashvili | 6 | 5 | 3 | | | | | | | W Moodie | 3 | 6 | 3 | | | | |
| | T Johansson | 6 | 6$^3$ | 6 | | | | | | | T Johansson | 6 | 3 | 6 | | | | |
| | F Dancevic | 0 | 7$^7$ | 3 | | T Johansson | w/o | | | | | | | | | | | |
| | R Schüttler | 6$^6$ | 4 | | 7 | M Youzhny | | | | | | | | | | | | |
| 7 | M Youzhny | 7$^8$ | 6 | | | | | | | | | | | | | T Johansson | 6 | 7$^7$ |
| 4 | T Haas | 6 | 6$^6$ | 6 | | | | | | | | | | | WC | I Kunitsyn | 3 | 6$^3$ |
| Q | N Zimonjić | 2 | 7$^8$ | 2 | 4 | T Haas | 6$^4$ | 6 | 2 | | | | | | | | | |
| | B Phau | 6$^6$ | 3 | | WC | I Kunitsyn | 7$^7$ | 4 | 6 | | | | | | | | | |
| WC | I Kunitsyn | 7$^8$ | 6 | | | | | | | WC | I Kunitsyn | 6 | 6 | | | | | |
| | D Bracciali | 3 | 3 | | | | | | | | P Starace | 3 | 2 | | | | | |
| | P Starace | 6 | 6 | | | P Starace | 7 | 3 | | | | | | | | | | |
| | J Tipsarević | 5 | 2 | | 5 | J Nieminen | 5 | 2$^r$ | | | | | | | | | | |
| 5 | J Nieminen | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | D Tursunov | 6 | 3 | 4 | | | | | | | | | | | | | | |
| | M Mirnyi | 4 | 6 | 6 | | M Mirnyi | 6 | 7 | | | | | | | | | | |
| Q | M Čilić | 4 | 5 | | | A Pavel | 3 | 5 | | | | | | | | | | |
| | A Pavel | 6 | 7 | | | | | | | | M Mirnyi | 4 | 5 | | | | | |
| Q | Ł Kubot | 4 | 6 | 3 | | | | | | 3 | M Ančić | 6 | 7 | | | | | |
| | R Sluiter | 6 | 3 | 6 | | R Sluiter | 3 | 4 | | | | | | | | | | |
| | P Goldstein | 5 | 1 | | 3 | M Ančić | 6 | 6 | | | | | | | | | | |
| 3 | M Ančić | 7 | 6 | | | | | | | | | | | | 3 | M Ančić | 6 | 6 |
| 8 | J Melzer | 6 | 4 | 3 | | | | | | | | | | | WC | E Gulbis | 2 | 3 |
| | L Dlouhý | 3 | 6 | 6 | | L Dlouhý | 7 | 3 | 3 | | | | | | | | | |
| | R Vik | 4 | 6 | 6$^4$ | WC | E Gulbis | 5 | 6 | 6 | | | | | | | | | |
| WC | E Gulbis | 6 | 3 | 7$^7$ | | | | | | WC | E Gulbis | 7$^8$ | 6$^4$ | 6 | | | | |
| | J Hernych | 6$^5$ | 6 | 7$^9$ | | | | | | | J Hernych | 6$^6$ | 7$^7$ | 2 | | | | |
| | E Korolev | 7$^7$ | 4 | 6$^7$ | | J Hernych | 6 | 6 | | | | | | | | | | |
| Q | W Arthurs | 6 | 2 | 6 | Q | W Arthurs | 4 | 4 | | | | | | | | | | |
| 2 | T Robredo | 3 | 6 | 4 | | | | | | | | | | | | | | |