2018 Argentina Open

The 2018 Argentina Open was a men's tennis tournament played on outdoor clay courts. It was the 21st edition of the ATP Buenos Aires event, and part of the ATP World Tour 250 series of the 2018 ATP World Tour. It took place in Buenos Aires, Argentina, from February 12 through 18, 2018.

Seeds

 * 1 Rankings are as of February 5, 2018.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇦🇷 Carlos Berlocq
 * 🇦🇷 Pedro Cachin
 * 🇦🇷 Nicolás Kicker

The following players received entry as special exempts:
 * 🇪🇸 Roberto Carballés Baena
 * 🇧🇷 Thiago Monteiro

The following players received entry using a protected ranking:
 * 🇦🇹 Andreas Haider-Maurer

The following players received entry from the qualifying draw:
 * 🇦🇷 Facundo Bagnis
 * 🇧🇷 Thomaz Bellucci
 * 🇮🇹 Marco Cecchinato
 * 🇧🇷 Rogério Dutra Silva

Withdrawals

 * Before the tournament
 * Marin Čilić → replaced by 🇪🇸 Guillermo García López
 * 🇺🇦 Alexandr Dolgopolov → replaced by 🇩🇪 Florian Mayer
 * 🇬🇧 Kyle Edmund → replaced by Gastão Elias
 * 🇮🇹 Paolo Lorenzi → replaced by 🇷🇸 Dušan Lajović

Seeds

 * 1 Rankings are as of February 5, 2018.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇫🇷 Dorian Descloix / 🇫🇷 Gaël Monfils
 * 🇦🇷 Guillermo Durán / 🇦🇷 Máximo González

Withdrawals

 * During the tournament
 * 🇪🇸 Pablo Carreño Busta

Singles

 * 🇦🇹 Dominic Thiem defeated Aljaž Bedene, 6–2, 6–4

Doubles

 * 🇦🇷 Andrés Molteni / 🇦🇷 Horacio Zeballos defeated 🇨🇴 Juan Sebastián Cabal / 🇨🇴 Robert Farah, 6–3, 5–7, [10–3]