The 2023 Challenger AAT was a professional tennis tournament played on clay courts.

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

It took place in Buenos Aires, Argentina between 24 and 30 April 2023.

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 players received entry as lucky losers: