# 2012 San Luis Potosí Challenger – Singles

Santiago Giraldo was the defending champion but decided not to participate. Spanish Rubén Ramírez Hidalgo won the tournament with the score 3–6, 6–3, 6–4 in the final against Paolo Lorenzi.

## Seeds

* Paolo Lorenzi (final)
* Rubén Ramírez Hidalgo (champion)
* Arnau Brugués Davi (first round, retired)
* Matteo Viola (first round)
* Jan Mertl (first round)
* Érik Chvojka (second round)
* Roman Borvanov (first round)
* Alejandro González (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 | Semifinals | Final | Final | Final | Final | Final |
| 1 | Paolo Lorenzi | 6 | 6 | | | | | | |
| | Riccardo Ghedin | 3 | 4 | | | | | | |
| | Riccardo Ghedin | 3 | 4 | | 1 | Paolo Lorenzi | 6 | 3 | 4 |
| | | | | | 2 | Rubén Ramírez Hidalgo | 3 | 6 | 6 |
| | Agustín Velotti | 2 | 7 | 4 | 2 | Rubén Ramírez Hidalgo | 3 | 6 | 6 |
| 2 | Rubén Ramírez Hidalgo | 6 | 5 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | P Lorenzi | 6 | 6 | | | | | | | | | | | | | | | |
| | S Decoud | 2 | 1 | | 1 | P Lorenzi | 6 | 3 | 6 | | | | | | | | | |
| | T Chen | 1 | 6$^1$ | | | S Diez | 0 | 6 | 1 | | | | | | | | | |
| | S Diez | 6 | 7$^7$ | | | | | | | 1 | P Lorenzi | 6 | 5 | 6 | | | | |
| LL | Fabiano de Paula | 6 | 0 | 6 | | | | | | LL | Fabiano de Paula | 0 | 7 | 2 | | | | |
| WC | M Sánchez | 3 | 6 | 2 | LL | Fabiano de Paula | 6 | 7$^7$ | | | | | | | | | | |
| WC | MA Reyes-Varela | 6 | 4 | 3 | 6 | É Chvojka | 4 | 6$^4$ | | | | | | | | | | |
| 6 | É Chvojka | 4 | 6 | 6 | | | | | | | | | | | 1 | P Lorenzi | 6 | 6 |
| 3 | A Brugués Davi | 1$^r$ | | | | | | | | | | | | | | R Ghedin | 3 | 4 |
| Q | D Zivkovic | 4 | | | Q | D Zivkovic | 6 | 6 | | | | | | | | | | |
| | A Begemann | 5 | 6 | 6 | | A Begemann | 2 | 1 | | | | | | | | | | |
| Q | JC Campozano | 7 | 4 | 2 | | | | | | Q | D Zivkovic | 5 | 6 | 6$^4$ | | | | |
| WC | Luis Patino | 4 | 3 | | | | | | | | R Ghedin | 7 | 3 | 7$^7$ | | | | |
| | C Saavedra-Corvalán | 6 | 6 | | | C Saavedra Corvalán | 2 | 7 | 4 | | | | | | | | | |
| | R Ghedin | 2 | 6 | 6 | | R Ghedin | 6 | 5 | 6 | | | | | | | | | |
| 5 | J Mertl | 6 | 2 | 2 | | | | | | | | | | | | | | |

### 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 |
| 8 | A González | 3 | 4 | | | | | | | | | | | | | | | | |
| | M Demoliner | 6 | 6 | | | M Demoliner | 6 | 3 | 1 | | | | | | | | | | |
| | A Velotti | 6 | 6 | | | A Velotti | 4 | 6 | 6 | | | | | | | | | | |
| | M Lammer | 4 | 3 | | | | | | | | A Velotti | 5 | 7$^7$ | 6 | | | | | |
| | A Molteni | 6 | 6 | | | | | | | | Marco Trungelliti | 7 | 6$^3$ | 1 | | | | | |
| | G Rivera Aránguiz | 4 | 2 | | | A Molteni | 3 | 1 | | | | | | | | | | | |
| | Marco Trungelliti | 6 | 6 | | | Marco Trungelliti | 6 | 6 | | | | | | | | | | | |
| 4 | M Viola | 2 | 0 | | | | | | | | | | | | | A Velotti | 2 | 7 | 4 |
| 7 | R Borvanov | 4 | 7$^7$ | 4 | | | | | | | | | | | 2 | R Ramírez Hidalgo | 6 | 5 | 6 |
| | G Clezar | 6 | 6$^4$ | 6 | | G Clezar | 7$^7$ | 3 | 6 | | | | | | | | | | |
| | F Martin | 6 | 2 | 6 | | F Martin | 6$^3$ | 6 | 2 | | | | | | | | | | |
| | M Marrai | 2 | 6 | 4 | | | | | | | G Clezar | 2 | 6 | 1 | | | | | |
| Q | A Martin | 6$^7$ | 6 | 6 | | | | | | 2 | R Ramírez Hidalgo | 6 | 4 | 6 | | | | | |
| WC | B Rodríguez | 7$^9$ | 1 | 4 | Q | A Martin | 2 | 6 | 2 | | | | | | | | | | |
| Q | M Echazú | 1 | 0 | | 2 | R Ramírez Hidalgo | 6 | 3 | 6 | | | | | | | | | | |
| 2 | R Ramírez Hidalgo | 6 | 6 | | | | | | | | | | | | | | | | |