# 2012 AON Open Challenger – Singles

Martin Kližan was the defending champion but decided not to participate. Albert Montañés won the title, defeating Tommy Robredo 6–4, 6–1 in the final.

## Seeds

* Andreas Seppi (quarterfinals)
* Fabio Fognini (withdrew because of a muscle strain)
* Paolo Lorenzi (first round)
* Filippo Volandri (semifinals)
* Simone Bolelli (semifinals)
* Lukáš Rosol (first round)
* Albert Montañés (champion)
* Frederico Gil (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 |
| 7 | Albert Montañés | 1 | 7$^7$ | 6 | | | | |
| 4 | Filippo Volandri | 6 | 6$^1$ | 3 | | | | |
| 4 | Filippo Volandri | 6 | 6$^1$ | 3 | 7 | Albert Montañés | 6 | 6 |
| | | | | | | Tommy Robredo | 4 | 1 |
| 5 | Simone Bolelli | 5 | 2 | | | Tommy Robredo | 4 | 1 |
| | Tommy Robredo | 7 | 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/WC | A Seppi | 3 | 6 | 6 | | | | | | | | | | | | | | |
| Q | R Olivo | 6 | 3 | 4 | 1/WC | A Seppi | 6 | 6 | | | | | | | | | | |
| | M Linzer | 4 | 5 | | | F Argüello | 2 | 3 | | | | | | | | | | |
| | F Argüello | 6 | 7 | | | | | | | 1/WC | A Seppi | 1 | 6$^5$ | | | | | |
| | D Meffert | 6$^7$ | 4 | | | | | | | 7 | A Montañés | 6 | 7$^7$ | | | | | |
| | G Naso | 7$^9$ | 6 | | | G Naso | 4 | 6 | 4 | | | | | | | | | |
| Alt | Enrico Burzi | 7$^7$ | 1 | 4 | 7 | A Montañés | 6 | 4 | 6 | | | | | | | | | |
| 7 | A Montañés | 6$^1$ | 6 | 6 | | | | | | | | | | 7 | A Montañés | 1 | 7$^7$ | 6 |
| 4 | F Volandri | 7$^8$ | 4 | 6 | | | | | | | | | | 4 | F Volandri | 6 | 6$^1$ | 3 |
| | A Giannessi | 6$^6$ | 6 | 3 | 4 | F Volandri | 6 | 6 | | | | | | | | | | |
| Q | A Begemann | 6$^5$ | 6 | 6 | Q | A Begemann | 3 | 0 | | | | | | | | | | |
| | P Capdeville | 7$^7$ | 3 | 2 | | | | | | 4 | F Volandri | 6 | 6 | | | | | |
| | S Gutiérrez Ferrol | 6 | 6 | | | | | | | | S Gutiérrez Ferrol | 4 | 4 | | | | | |
| | K Čapkovič | 4 | 1 | | | S Gutiérrez Ferrol | 6 | 2 | 6 | | | | | | | | | |
| PR | F Škugor | 2 | 2 | | 8 | F Gil | 2 | 6 | 1 | | | | | | | | | |
| 8 | F Gil | 6 | 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 |
| 5 | S Bolelli | 7$^7$ | 3 | 7 | | | | | | | | | | | | | | |
| | S Robert | 6$^3$ | 6 | 5 | 5 | S Bolelli | 7$^7$ | 6 | | | | | | | | | | |
| | P Červenák | 7 | 6 | | | P Červenák | 6$^1$ | 1 | | | | | | | | | | |
| Q | A Brizzi | 5 | 2 | | | | | | | 5 | S Bolelli | 7 | 6 | | | | | |
| | T Fabbiano | 6 | 6 | | | | | | | | T Fabbiano | 5 | 4 | | | | | |
| | P Oswald | 2 | 4 | | | T Fabbiano | 4 | 6 | 6 | | | | | | | | | |
| | D Brown | 7$^{10}$ | 7$^7$ | | | D Brown | 6 | 3 | 2 | | | | | | | | | |
| 3 | P Lorenzi | 6$^8$ | 6$^1$ | | | | | | | | | | | | 5 | S Bolelli | 5 | 2 |
| 6/WC | L Rosol | 7$^9$ | 2 | 4 | | | | | | | | | | | | T Robredo | 7 | 6 |
| | T Robredo | 6$^7$ | 6 | 6 | | T Robredo | 6 | 2 | 7$^7$ | | | | | | | | | |
| | S Vagnozzi | 6$^2$ | 6 | 6 | | S Vagnozzi | 0 | 6 | 6$^4$ | | | | | | | | | |
| | G Andreozzi | 7$^7$ | 2 | 1 | | | | | | | T Robredo | 3 | 6 | 6 | | | | |
| Q | M Crugnola | 6$^9$ | 6 | 6 | | | | | | LL | W Trusendi | 6 | 2 | 2 | | | | |
| | M Lammer | 7$^{11}$ | 1 | 3 | Q | M Crugnola | 4 | 6 | 4 | | | | | | | | | |
| WC | F Nielsen | 2 | 5 | | LL | W Trusendi | 6 | 2 | 6 | | | | | | | | | |
| LL | W Trusendi | 6 | 7 | | | | | | | | | | | | | | | |