Dominic Thiem was the defending champion, but lost in the quarterfinals to Fernando Verdasco.

Diego Schwartzman Diego Sebastián Schwartzman (, ; born 16 August 1992) is an Argentine professional tennis player. He has won four ATP singles titles and reached his career-high singles ranking of world 8 in October 2020. As a clay court specialist, his be ...

won the title, defeating Verdasco in the final, 6–2, 6–3.

Seeds

Draw

Finals

Top half

Bottom half

Qualifying

Seeds

Qualifiers

Lucky losers

# Gastão Elias

Qualifying draw

First qualifier

Second qualifier

Third qualifier

Fourth qualifier

References

Main draw

Qualifying draw
{{DEFAULTSORT:2018 Rio Open - Singles Rio Open - Singles

Rio Rio or Río is the Portuguese, Spanish, Italian, and Maltese word for "river". When spoken on its own, the word often means Rio de Janeiro, a major city in Brazil. Rio or Río may also refer to: Geography Brazil * Rio de Janeiro * Rio do Sul, a ...

Rio Open