Tennis tournament
The 2021 Open de Oeiras III was a professional tennis tournament played on clay courts. It was the third edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Oeiras, Portugal between 17 and 23 May 2021.
Singles main-draw entrants
Seeds
- 1 Rankings are as of 10 May 2021.[1]
Other entrants
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:
Champions
Singles
Doubles
References