2020 Rio Open – Singles

Cristian Garín won the title, defeating Gianluca Mager in the final, 7–6(7–3), 7–5.

Laslo Đere was the defending champion, but withdrew with an abdominal injury before the tournament began.

This was the first clay court tournament where players were allowed to use the challenge system.

This tournament was notable for being the ATP debut of future world No.1 Carlos Alcaraz. He received a wildcard into the main draw and reached the second round, after a win over compatriot Albert Ramos Viñolas.

Seeds
• #🇦🇹 Dominic Thiem (quarterfinals)

• #🇷🇸 Dušan Lajović (second round)

• # Cristian Garín (champion)

• #🇦🇷 Guido Pella (first round)

• # Borna Ćorić (semifinals)

• #🇷🇸 Laslo Đere (withdrew)

• #🇪🇸 Albert Ramos Viñolas (first round)

• #🇳🇴 Casper Ruud (first round)

• #🇪🇸 Fernando Verdasco (first round)

Seeds
• # 🇸🇰 Andrej Martin (moved to main draw)

• # 🇭🇺 Attila Balázs (qualifying competition, lucky loser)

• # 🇦🇷 Federico Coria (qualified)

• # 🇮🇹 Federico Gaio (qualifying competition, lucky loser)

• # 🇮🇹 Gianluca Mager (qualified)

• # 🇸🇰 Jozef Kovalík (qualifying competition)

• # 🇪🇸 Pedro Martínez (qualified)

• # 🇮🇹 Alessandro Giannessi (first round, retired)

Qualifiers
• # 🇪🇸 Pedro Martínez

• # 🇮🇹 Gianluca Mager

• # 🇦🇷 Federico Coria

• # João Domingues

Lucky losers
• # 🇭🇺 Attila Balázs

• # 🇮🇹 Federico Gaio