| 2018 Argentina Open | |
|---|---|
| Date | 12–18 February |
| Edition | 21st |
| Category | ATP World Tour 250 series |
| Draw | 28S/16D |
| Prize money | $546,680 |
| Surface | clay |
| Location | Buenos Aires,Argentina |
| Champions | |
| Singles | |
 Dominic Thiem | |
| Doubles | |
 Andrés Molteni /Horacio Zeballos | |
The2018 Argentina Open was a men'stennis tournament played on outdoorclay courts. It was the 21st edition of theATP Buenos Aires event, and part of theATP World Tour 250 series of the2018 ATP World Tour. It took place inBuenos Aires,Argentina, from February 12 through 18, 2018.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q | Q2 | Q1 |
| Singles | 250 | 150 | 90 | 45 | 20 | 0 | 12 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|
| Doubles | 0 | N/a | N/a | N/a | N/a |
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q2 | Q1 |
| Singles | $97,470 | $51,355 | $27,810 | $15,840 | $9,335 | $5,530 | $2,490 | $1,240 |
| Doubles | $29,610 | $15,570 | $8,430 | $4,830 | $2,830 | N/a | N/a | N/a |
| Doubles prize money per team | ||||||||
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| AUT | Dominic Thiem | 6 | 1 |
 ESP | Pablo Carreño Busta | 10 | 2 |
| ESP | Albert Ramos Viñolas | 21 | 3 |
 ITA | Fabio Fognini | 22 | 4 |
| ARG | Diego Schwartzman | 24 | 5 |
 GBR | Kyle Edmund | 26 | 6 |
 URU | Pablo Cuevas | 32 | 7 |
| ESP | Fernando Verdasco | 40 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry as special exempts:
The following players received entry using a protected ranking:
The following players received entry from the qualifying draw:
Marin Čilić → replaced byGuillermo García López
Alexandr Dolgopolov → replaced by
Florian MayerKyle Edmund → replaced by
Gastão EliasPaolo Lorenzi → replaced by
Dušan Lajović| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 COL | Juan Sebastián Cabal | COL | Robert Farah | 35 | 1 |
 MEX | Santiago González |  CHI | Julio Peralta | 57 | 2 |
| CRO | Nikola Mektić | AUT | Alexander Peya | 80 | 3 |
| ARG | Andrés Molteni | ARG | Horacio Zeballos | 84 | 4 |
The following pairs received wildcards into the doubles main draw:
Dominic Thiem defeated
Aljaž Bedene, 6–2, 6–4Andrés Molteni /Horacio Zeballos defeatedJuan Sebastián Cabal /Robert Farah, 6–3, 5–7, [10–3]
