The 2023 HPP Open was a professional tennis tournament played on hard courts.

It was the fourth edition of the tournament which was part of the 2023 ATP Challenger Tour.

It took place in Helsinki, Finland between 6 and 12 November 2023.

The following players received wildcards into the singles main draw: The following player received entry into the singles main draw as a special exempt: 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: