# 2015 San Luis Open Challenger Tour – Singles

Paolo Lorenzi was the defending champion, but lost in the semifinals.
Guido Pella won the title, defeating James McGee in the final, 6–3, 6–3.

## Seeds

* Teymuraz Gabashvili (quarterfinals)
* Paolo Lorenzi (semifinals)
* Damir Džumhur (first round)
* James Duckworth (semifinals)
* Luca Vanni (withdrew)
* Adrián Menéndez Maceiras (quarterfinals)
* Austin Krajicek (second round)
* Horacio Zeballos (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 |
| | Guido Pella | 6 | 6 | | | | |
| 4 | James Duckworth | 3 | 3 | | | | |
| 4 | James Duckworth | 3 | 3 | | Guido Pella | 6 | 6 |
| | | | | | James McGee | 3 | 3 |
| | James McGee | 6 | 5 | 6 | James McGee | 3 | 3 |
| 2 | Paolo Lorenzi | 3 | 7 | 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 | T Gabashvili | 3 | 6 | 6 | | | | | | | | | | | | | | |
| WC | Mauricio Astorga | 6 | 2 | 3 | 1 | T Gabashvili | 6$^8$ | 6 | 7$^7$ | | | | | | | | | |
| | H Podlipnik Castillo | 6 | 6 | | | H Podlipnik Castillo | 7$^{10}$ | 3 | 6$^5$ | | | | | | | | | |
| Q | E Struvay | 1 | 4 | | | | | | | 1 | T Gabashvili | 6 | 4 | 3 | | | | |
| | G Pella | 6 | 6 | | | | | | | | G Pella | 2 | 6 | 6 | | | | |
| WC | D Garza | 3 | 4 | | | G Pella | 7$^7$ | 7 | | | | | | | | | | |
| | N Langer | 3 | 3 | | 7 | A Krajicek | 6$^3$ | 5 | | | | | | | | | | |
| 7 | A Krajicek | 6 | 6 | | | | | | | | | | | | | G Pella | 6 | 6 |
| 4 | J Duckworth | 3 | 6 | 6 | | | | | | | | | | | 4 | J Duckworth | 3 | 3 |
| | M Arévalo | 6 | 3 | 2 | 4 | J Duckworth | 7$^7$ | 6 | | | | | | | | | | |
| Q | I Endara | 6 | 6 | | Q | I Endara | 6$^5$ | 4 | | | | | | | | | | |
| Q | JS Gómez | 3 | 4 | | | | | | | 4 | J Duckworth | 6 | 6 | | | | | |
| WC | M Sánchez | 7$^7$ | 7$^7$ | | | | | | | 6 | A Menéndez Maceiras | 1 | 4 | | | | | |
| | G Escobar | 6$^5$ | 6$^5$ | | WC | M Sánchez | 4 | 4 | | | | | | | | | | |
| | F de Paula | 2 | 1 | | 6 | A Menéndez Maceiras | 6 | 6 | | | | | | | | | | |
| 6 | A Menéndez Maceiras | 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| LL | G Lapentti | 6 | 7 | | | | | | | | | | | | | | | |
| | C Buchanan | 0 | 5 | | LL | G Lapentti | 6 | 4 | 1 | | | | | | | | | |
| | R Olivo | 6$^5$ | 6 | 1 | Alt | A Molteni | 1 | 6 | 6 | | | | | | | | | |
| Alt | A Molteni | 7$^7$ | 4 | 6 | | | | | | Alt | A Molteni | 1 | 4 | | | | | |
| | Connor Smith | 2 | 5 | | | | | | | | J McGee | 6 | 6 | | | | | |
| | G Clezar | 6 | 7 | | | G Clezar | 3 | 6 | 6$^4$ | | | | | | | | | |
| | J McGee | 7 | 6 | | | J McGee | 6 | 2 | 7$^7$ | | | | | | | | | |
| 3 | D Džumhur | 5 | 3 | | | | | | | | | | | | J McGee | 6 | 5 | 6 |
| 8 | H Zeballos | 7$^7$ | 5 | 6$^3$ | | | | | | | | | | 2 | P Lorenzi | 3 | 7 | 3 |
| | JI Londero | 6$^3$ | 7 | 7$^7$ | | JI Londero | 3 | 6 | 7$^7$ | | | | | | | | | |
| | B Klein | 1 | 7$^{10}$ | 1 | Q | C Zampieri | 6 | 4 | 6$^4$ | | | | | | | | | |
| Q | C Zampieri | 6 | 6$^8$ | 6 | | | | | | | JI Londero | 4 | 4 | | | | | |
| WC | T Hank | 6 | 3 | 4 | | | | | | 2 | P Lorenzi | 6 | 6 | | | | | |
| | G Melzer | 4 | 6 | 6 | | G Melzer | 2 | 6 | 5 | | | | | | | | | |
| | D Novikov | 4 | 1 | | 2 | P Lorenzi | 6 | 4 | 7 | | | | | | | | | |
| 2 | P Lorenzi | 6 | 6 | | | | | | | | | | | | | | | |