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

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

It took place in Cassis, France between 4 and 10 September 2023.

The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following players received entry as lucky losers: