Austin Krajicek and Jackson Withrow were the defending champions but only Krajicek chose to defend his title, partnering Matt Reid. Krajicek withdrew before the tournament began due to injury.
| Doubles | |
|---|---|
| 2018 Morelos Open | |
| Champions |  Roberto Maytín Fernando Romboli |
| Runners-up |  Evan King Nathan Pasha |
| Score | 7–5, 6–3 |
Roberto Maytín and Fernando Romboli won the title after defeating Evan King and Nathan Pasha 7–5, 6–3 in the final.
Seeds
edit
Marcelo Arévalo / 
Miguel Ángel Reyes-Varela (quarterfinals)
Austin Krajicek / 
Matt Reid (withdrew)
Franco Agamenone / 
Sergio Galdós (quarterfinals)
Ruan Roelofse / Max Schnur (semifinals)
Draw
editKey
edit- 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
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | M Arévalo MÁ Reyes-Varela
| 6 | 6 | ||||||||||||||||||||||||
 R Gonzales H Reese
| 3 | 4 | 1 | M Arévalo MÁ Reyes-Varela
| 3 | 65 | |||||||||||||||||||||
| E King N Pasha
| 712 | 6 | E King N Pasha
| 6 | 77 | ||||||||||||||||||||||
| WC | L Patiño R Quiroz
| 610 | 4 | E King N Pasha
| 78 | 79 | |||||||||||||||||||||
| 4 | R Roelofse M Schnur
| 6 | 6 | 4 | R Roelofse M Schnur
| 66 | 67 | ||||||||||||||||||||
 S Diez R Ortega Olmedo
| 4 | 4 | 4 | R Roelofse M Schnur
| 710 | 78 | |||||||||||||||||||||
D Novikov A Pavić
| 6 | 6 | D Novikov A Pavić
| 68 | 66 | ||||||||||||||||||||||
| WC | G López Villaseñor M Sánchez
| 3 | 4 | E King N Pasha
| 5 | 3 | |||||||||||||||||||||
 B Arias F Zeballos
| 3 | 77 | [10] |  R Maytín F Romboli
| 7 | 6 | |||||||||||||||||||||
 P Krstin D Popko
| 6 | 65 | [6] | B Arias F Zeballos
| 77 | 6 | |||||||||||||||||||||
| WC | Isaac Arturo Arévalo T Hank
| 1 | 0 | 3 | F Agamenone S Galdós
| 65 | 4 | ||||||||||||||||||||
| 3 | F Agamenone S Galdós
| 6 | 6 | B Arias F Zeballos
| 3 | 4 | |||||||||||||||||||||
| R Maytín F Romboli
| 6 | 6 | R Maytín F Romboli
| 6 | 6 | ||||||||||||||||||||||
 B Saraiva S Verbeek
| 3 | 3 | R Maytín F Romboli
| 66 | 6 | [10] | |||||||||||||||||||||
LD Martínez R Statham
| w/o | LD Martínez R Statham
| 78 | 4 | [8] | ||||||||||||||||||||||
| Alt |  DE Galán A González
| ||||||||||||||||||||||||||