2019 Argentina Open – Singles

Dominic Thiem was the defending champion, but lost to Diego Schwartzman in the semifinals.

Marco Cecchinato won the title, defeating Schwartzman in the final, 6–1, 6–2.

Seeds
The top four seeds received a bye into the second round. • #🇦🇹 Dominic Thiem (semifinals)

• #🇮🇹 Fabio Fognini (second round)

• #🇮🇹 Marco Cecchinato (champion)

• #🇦🇷 Diego Schwartzman (final)

• # João Sousa (second round)

• # Nicolás Jarry (first round)

• #🇷🇸 Dušan Lajović (first round)

• #🇹🇳 Malek Jaziri (first round)

Seeds
• # 🇬🇧 Cameron Norrie (qualifying competition)

• # 🇧🇷 Thiago Monteiro (first round)

• # 🇮🇹 Lorenzo Sonego (qualified)

• # 🇸🇪 Elias Ymer (qualifying competition)

• # 🇧🇴 Hugo Dellien (qualifying competition)

• # 🇦🇷 Marco Trungelliti (first round)

• # 🇳🇴 Casper Ruud (first round)

• # 🇦🇷 Carlos Berlocq (first round)

Qualifiers
• # 🇧🇷 Rogério Dutra Silva

• # 🇦🇷 Facundo Bagnis

• # 🇮🇹 Lorenzo Sonego

• # Marcelo Arévalo