2021 Porto Open
The 2021 Porto Open was a professional tennis tournament played on hardcourts. It was the first edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Porto, Portugal between 28 June and 4 July 2021.
Singles main-draw entrants
Seeds
1 Rankings are as of 21 June 2021.Other entrants
The following players received wildcards into the singles main draw:The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser: