Juan Sebastián Cabal and Treat Huey were the defending champions, but Huey chose not to participate and Cabal chose to compete in Washington instead.
| Doubles | |
|---|---|
| 2018 Los Cabos Open | |
| Champions |  Marcelo Arévalo Miguel Ángel Reyes-Varela |
| Runners-up |  Taylor Fritz Thanasi Kokkinakis |
| Score | 6–4, 6–4 |
Marcelo Arévalo and Miguel Ángel Reyes-Varela won the title, defeating Taylor Fritz and Thanasi Kokkinakis in the final, 6–4, 6–4.
Seeds
Santiago González / 
David Marrero (first round)
Jonathan Erlich / 
Joe Salisbury (quarterfinals)
Marcelo Arévalo / Miguel Ángel Reyes-Varela (champions)
Romain Arneodo / 
Nicholas Monroe (semifinals)
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
Draw
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | S González  D Marrero | 7 | 3 | [4] | |||||||||||||||||||||||
 A Begemann  I Karlović | 5 | 6 | [10] | A Begemann I Karlović | 6 | 713 | |||||||||||||||||||||
 F Neis F Romboli | 6 | 6 | F Neis F Romboli | 3 | 611 | ||||||||||||||||||||||
| WC | M Sánchez B Tomic | 4 | 3 | A Begemann I Karlović | 5 | 6 | [7] | ||||||||||||||||||||
| 3 | M Arévalo MÁ Reyes-Varela | 7 | 77 | 3 | M Arévalo MÁ Reyes-Varela | 7 | 2 | [10] | |||||||||||||||||||
 L Bambridge J O'Mara | 5 | 62 | 3 | M Arévalo MÁ Reyes-Varela | 77 | 6 | |||||||||||||||||||||
H Hach Verdugo  A Siljeström | 1 | 7 | [10] | H Hach Verdugo A Siljeström | 65 | 2 | |||||||||||||||||||||
| WC | L Gómez L Patiño | 6 | 5 | [7] | 3 | M Arévalo MÁ Reyes-Varela | 6 | 6 | |||||||||||||||||||
A Krajicek  J Nedunchezhiyan | 7 | 6 | T Fritz T Kokkinakis | 4 | 4 | ||||||||||||||||||||||
| P Raja J Withrow | 5 | 3 | A Krajicek J Nedunchezhiyan | 5 | 4 | ||||||||||||||||||||||
| E King N Pasha | 2 | 2 | 4 |  R Arneodo N Monroe | 7 | 6 | |||||||||||||||||||||
| 4 | R Arneodo N Monroe | 6 | 6 | 4 | R Arneodo N Monroe | 2 | 4 | ||||||||||||||||||||
| T Fritz T Kokkinakis | 4 | 6 | [10] | T Fritz T Kokkinakis | 6 | 6 | |||||||||||||||||||||
 S Galdós  P Polansky | 6 | 2 | [6] | T Fritz T Kokkinakis | 77 | 6 | |||||||||||||||||||||
| B Mousley E Ymer | 1 | 2 | 2 |  J Erlich J Salisbury | 65 | 4 | |||||||||||||||||||||
| 2 | J Erlich J Salisbury | 6 | 6 | ||||||||||||||||||||||||
References
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