See main article: 2020 Rio Open.
Cristian Garín won the title, defeating Gianluca Mager in the final, 7–6(7–3), 7–5.
Laslo Đere was the defending champion,[1] 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.[2]
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.