# 2018 Milex Open – Singles

Víctor Estrella Burgos was the defending champion but lost in the first round to Federico Delbonis.
Christian Garín won the title after defeating Delbonis 6–4, 5–7, 6–4 in the final.

## Seeds

* Pablo Cuevas (first round)
* Federico Delbonis (final)
* Guido Andreozzi (second round)
* Hugo Dellien (first round)
* Paolo Lorenzi (quarterfinals)
* Thiago Monteiro (first round)
* Juan Ignacio Londero (second round)
* Facundo Bagnis (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 |
| | Carlos Berlocq | 7 | 6$^4$ | 1 | | | | | |
| | Christian Garín | 5 | 7$^7$ | 6 | | | | | |
| | Christian Garín | 5 | 7$^7$ | 6 | | Christian Garín | 6 | 5 | 6 |
| | | | | | 2 | Federico Delbonis | 4 | 7 | 4 |
| | Peđa Krstin | 0 | 3 | | 2 | Federico Delbonis | 4 | 7 | 4 |
| 2 | Federico Delbonis | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | P Cuevas | 6$^5$ | 6 | 3 | | | | | | | | | | | | | |
| PR | S Giraldo | 7$^7$ | 2 | 6 | PR | S Giraldo | 6$^4$ | 6$^2$ | | | | | | | | | |
| | C Berlocq | 6 | 6 | | | C Berlocq | 7$^7$ | 7$^7$ | | | | | | | | | |
| Q | A Gómez | 4 | 3 | | | | | | | C Berlocq | 6 | 4 | 6 | | | | |
| WC | J Olivares | 2 | 0 | | | | | | WC | J Hernández-Fernández | 1 | 6 | 2 | | | | |
| Q | F Coria | 6 | 6 | | Q | F Coria | 5 | 0 | | | | | | | | | |
| WC | J Hernández-Fernández | 7 | 1 | 7 | WC | J Hernández-Fernández | 7 | 6 | | | | | | | | | |
| 6 | T Monteiro | 5 | 6 | 5 | | | | | | | | | | C Berlocq | 7 | 6$^4$ | 1 |
| 3 | G Andreozzi | 6$^2$ | 6 | 6 | | | | | | | | | | C Garín | 5 | 7$^7$ | 6 |
| Q | M Cuevas | 7$^7$ | 2 | 3 | 3 | G Andreozzi | 6$^2$ | 4 | | | | | | | | | |
| | N Serdarušić | 7$^7$ | 6 | | | N Serdarušić | 7$^7$ | 6 | | | | | | | | | |
| Alt | T Bellucci | 6$^5$ | 4 | | | | | | | N Serdarušić | 2 | 2 | | | | | |
| | S Ofner | 2 | 0 | | | | | | | C Garín | 6 | 6 | | | | | |
| | C Garín | 6 | 6 | | | C Garín | 6 | 6 | | | | | | | | | |
| | R Quiroz | 1 | 3 | | 7 | JI Londero | 3 | 1 | | | | | | | | | |
| 7 | JI Londero | 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 |
| 8 | F Bagnis | 4 | 2 | | | | | | | | | | | | | | |
| WC | E Gómez | 6 | 6 | | WC | E Gómez | 3 | 1 | | | | | | | | | |
| | P Krstin | 6 | 6 | | | P Krstin | 6 | 6 | | | | | | | | | |
| | R Cid Subervi | 0 | 1 | | | | | | | | P Krstin | 6 | 3 | | | | |
| | M Arévalo | 3 | 6$^7$ | | | | | | | PR | J Melzer | 1 | 2$^r$ | | | | |
| | G Elias | 6 | 7$^9$ | | | G Elias | 7$^7$ | 6$^3$ | 6$^1$ | | | | | | | | |
| PR | J Melzer | 7 | 6 | | PR | J Melzer | 6$^0$ | 7$^7$ | 7$^7$ | | | | | | | | |
| 4 | H Dellien | 5 | 3 | | | | | | | | | | | | P Krstin | 0 | 3 |
| 5 | P Lorenzi | 3 | 6 | 6 | | | | | | | | | | 2 | F Delbonis | 6 | 6 |
| Q | JP Varillas | 6 | 1 | 0 | 5 | P Lorenzi | 7$^9$ | 7$^7$ | | | | | | | | | |
| | G Melzer | 6 | 2 | | | G Melzer | 6$^7$ | 6$^3$ | | | | | | | | | |
| Alt | P Cachin | 2 | 0$^r$ | | | | | | | 5 | P Lorenzi | 5 | 5 | | | | |
| | M Vilella Martínez | 1 | 3 | | | | | | | 2 | F Delbonis | 7 | 7 | | | | |
| | R Dutra Silva | 6 | 6 | | | R Dutra Silva | 4 | 1 | | | | | | | | | |
| WC | V Estrella Burgos | 5 | 3 | | 2 | F Delbonis | 6 | 6 | | | | | | | | | |
| 2 | F Delbonis | 7 | 6 | | | | | | | | | | | | | | |