The 2021 Aberto da República was a professional tennis tournament played on outdoor (men) and indoor (women) clay courts.

It was the first edition of the tournament which was part of the 2021 ATP Challenger Tour and the 2021 ITF Women's World Tennis Tour.

It took place in Brasília, Brazil between 22 and 28 November 2021.

[1][2] The following players received wildcards into the singles main draw: The following player received entry into the singles main draw as an alternate: The following players received entry from the qualifying draw: The following player received entry as a lucky loser: The following players received wildcards into the singles main draw: The following players received entry using protected rankings: The following players received entry from the qualifying draw: The following players received entry as lucky losers: