# 2010 ATP Studena Croatia Open Umag – Singles

Nikolay Davydenko was the champion in 2009. He tried to defend his title, but lost to Juan Ignacio Chela in the quarterfinal. Juan Carlos Ferrero won in the final over Potito Starace 6–4, 6–4.

## Seeds

The top four seeds receive a bye into the second round.
* Nikolay Davydenko (quarterfinals)
* Jürgen Melzer (quarterfinals)
* Ivan Ljubičić (quarterfinals)
* Juan Carlos Ferrero (champion)
* Philipp Petzschner (first round)
* Alexandr Dolgopolov (quarterfinals)
* Sergiy Stakhovsky (first round)
* Juan Ignacio Chela (semifinals)

## 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 |
| 8 | Juan Ignacio Chela | 7$^7$ | 3 | 2 | | | | |
| | Potito Starace | 6$^4$ | 6 | 6 | | | | |
| | Potito Starace | 6$^4$ | 6 | 6 | | Potito Starace | 4 | 4 |
| | | | | | 4 | Juan Carlos Ferrero | 6 | 6 |
| 4 | Juan Carlos Ferrero | 6 | 6 | | 4 | Juan Carlos Ferrero | 6 | 6 |
| | Andreas Seppi | 4 | 2 | | | | | |

### 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 | N Davydenko | 6 | 6 | | | | | | | | | | |
| | S Robert | 6 | 6 | | | S Robert | 1 | 2 | | | | | | | | | | |
| Q | O Patience | 3 | 2 | | | | | | | 1 | N Davydenko | 2 | 1 | | | | | |
| WC | A Veić | 6$^3$ | 3 | | | | | | | 8 | JI Chela | 6 | 6 | | | | | |
| Q | S Bolelli | 7$^7$ | 6 | | Q | S Bolelli | 6$^5$ | 7$^7$ | 1 | | | | | | | | | |
| | R Ramírez Hidalgo | 4 | 1 | | 8 | JI Chela | 7$^7$ | 6$^4$ | 6 | | | | | | | | | |
| 8 | JI Chela | 6 | 6 | | | | | | | | | | | 8 | JI Chela | 7$^7$ | 3 | 2 |
| | | | | | | | | | | | | | | | P Starace | 6$^4$ | 6 | 6 |
| | | | | | 3 | I Ljubičić | 4 | 6 | 6 | | | | | | | | | |
| | I Navarro | 3 | 4 | | WC | I Dodig | 6 | 4 | 2 | | | | | | | | | |
| WC | I Dodig | 6 | 6 | | | | | | | 3 | I Ljubičić | 4 | 6$^6$ | | | | | |
| | F Fognini | 1 | 4 | | | | | | | | P Starace | 6 | 7$^8$ | | | | | |
| | B Phau | 6 | 6 | | | B Phau | 4 | 0 | | | | | | | | | | |
| | P Starace | 6 | 6$^5$ | 6 | | P Starace | 6 | 6 | | | | | | | | | | |
| 7 | S Stakhovsky | 3 | 7$^7$ | 0 | | | | | | | | | | | | | | |

### 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 |
| 6 | A Dolgopolov | 6 | 6$^6$ | 7$^7$ | | | | | | | | | | | | | |
| | P Lorenzi | 3 | 7$^8$ | 6$^3$ | 6 | A Dolgopolov | 7$^7$ | 6 | | | | | | | | | |
| WC | F Škugor | 6 | 6 | | WC | F Škugor | 6$^1$ | 3 | | | | | | | | | |
| | F Volandri | 2 | 1 | | | | | | | 6 | A Dolgopolov | 1 | 2 | | | | |
| | P Cuevas | 6 | 6 | | | | | | | 4 | JC Ferrero | 6 | 6 | | | | |
| Q | S Vagnozzi | 4 | 1 | | | P Cuevas | 6 | 4 | 4 | | | | | | | | |
| | | | | | 4 | JC Ferrero | 4 | 6 | 6 | | | | | | | | |
| | | | | | | | | | | | | | | 4 | JC Ferrero | 6 | 6 |
| 5 | P Petzschner | 2 | 3 | | | | | | | | | | | | A Seppi | 4 | 2 |
| | O Rochus | 6 | 6 | | | O Rochus | 4 | 2 | | | | | | | | | |
| | A Seppi | 6 | 3 | 6 | | A Seppi | 6 | 6 | | | | | | | | | |
| | M González | 3 | 6 | 1 | | | | | | | A Seppi | 6 | 6 | | | | |
| | J Hájek | 6 | 6 | | | | | | | 2 | J Melzer | 1 | 4 | | | | |
| Q | G Melzer | 4 | 3 | | | J Hájek | 1 | 0 | | | | | | | | | |
| | | | | | 2 | J Melzer | 6 | 6 | | | | | | | | | |