# 2009 San Luis Potosí Challenger – Singles

Brian Dabul chose to not defend his 2008 title. Santiago Giraldo defeated Paolo Lorenzi in the final 6–2, 6–7(3), 6–2.

## Seeds

* Horacio Zeballos (quarterfinals)
* Santiago Giraldo (champion)
* Franco Ferreiro (quarterfinals)
* Mariano Puerta (semifinals)
* Alejandro Falla (first round)
* Michael Lammer (second round)
* Santiago González (semifinals)
* Paolo Lorenzi (final)

## 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

### Final four

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 8 | Paolo Lorenzi | 6 | 6 | | | | | |
| 7 | Santiago González | 2 | 3 | | | | | |
| 7 | Santiago González | 2 | 3 | 8 | Paolo Lorenzi | 2 | 7 | 2 |
| | | | | 2 | Santiago Giraldo | 6 | 6$^3$ | 6 |
| 4/WC | Mariano Puerta | 3 | 2 | 2 | Santiago Giraldo | 6 | 6$^3$ | 6 |
| 2 | Santiago Giraldo | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | H Zeballos | 7 | 7 | | | | | | | | | | | | | |
| | J Mitsuhashi | 6$^4$ | 6$^5$ | | 1 | H Zeballos | 6 | 6 | | | | | | | | |
| | J Ward | 6 | 3 | 6 | | J Ward | 0 | 3 | | | | | | | | |
| | J Souza | 3 | 6 | 3 | | | | | 1 | H Zeballos | 4 | 2 | | | | |
| | M Quintero | 3 | 6 | 7 | | | | | 8 | P Lorenzi | 6 | 6 | | | | |
| WC | M Sánchez | 6 | 4 | 6$^5$ | | M Quintero | 2 | 1 | | | | | | | | |
| | R Ghedin | 1 | 6 | 4 | 8 | P Lorenzi | 6 | 6 | | | | | | | | |
| 8 | P Lorenzi | 6 | 4 | 6 | | | | | | | | | 8 | P Lorenzi | 6 | 6 |
| 3 | F Ferreiro | 7 | 6 | | | | | | | | | | 7 | S González | 2 | 3 |
| | B Kavčič | 5 | 4 | | 3 | F Ferreiro | 6 | 6 | | | | | | | | |
| | C Salamanca | 6 | 6 | | | C Salamanca | 4 | 3 | | | | | | | | |
| WC | M Zabaleta | 3 | 4 | | | | | | 3 | F Ferreiro | 6$^7$ | 0 | | | | |
| | N Desein | 6 | 3 | 1 | | | | | 7 | S González | 7 | 6 | | | | |
| | M Felder | 1 | 6 | 6 | | M Felder | 2 | 2 | | | | | | | | |
| | C Ebelthite | 2 | 2 | | 7 | S González | 6 | 6 | | | | | | | | |
| 7 | S González | 6 | 6 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | A Falla | 3 | 5 | | | | | | | | | | | | | |
| Q | A González | 6 | 7 | | Q | A González | 2 | 6$^5$ | | | | | | | | |
| | V Estrella | 6 | 6$^5$ | 6 | | V Estrella | 6 | 7 | | | | | | | | |
| | A Miele | 4 | 7 | 3 | | | | | | V Estrella | 6$^5$ | 3 | | | | |
| | G Alcaide | 2 | 6$^4$ | | | | | | 4/WC | M Puerta | 7 | 6 | | | | |
| WC | LM Flores | 6 | 7 | | WC | LM Flores | 3 | 1 | | | | | | | | |
| | J Silva | 6$^5$ | 3 | | 4/WC | M Puerta | 6 | 6 | | | | | | | | |
| 4/WC | M Puerta | 7 | 6 | | | | | | | | | | 4/WC | M Puerta | 3 | 2 |
| 6 | M Lammer | 6 | 7 | | | | | | | | | | 2 | S Giraldo | 6 | 6 |
| Q | V Millot | 2 | 6$^1$ | | 6 | M Lammer | 5 | 1 | | | | | | | | |
| | R Eitzinger | 7 | 6 | | | R Eitzinger | 7 | 6 | | | | | | | | |
| | D Olejniczak | 5 | 0 | | | | | | | R Eitzinger | 4 | 2 | | | | |
| | B Echagaray | 6 | 6 | | | | | | 2 | S Giraldo | 6 | 6 | | | | |
| Q | JS Cabal | 4 | 4 | | | B Echagaray | w/o | | | | | | | | | |
| Q | JC Campozano | 5 | 2 | | 2 | S Giraldo | | | | | | | | | | |
| 2 | S Giraldo | 7 | 6 | | | | | | | | | | | | | |