The 2018 Brasil Open was a tennis tournament played on indoor clay courts.

It was the 18th edition of the Brasil Open, and part of the ATP World Tour 250 series of the 2018 ATP World Tour.

It took place from February 26 through March 4, 2018, in São Paulo, Brazil.

The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: The following pairs received entry as alternates: