The 2023 Moselle Open was a men's tennis tournament to be played on indoor hard courts. It was the 20th edition of the event, and it is part of the ATP 250 tournaments on the 2023 ATP Tour. It took place at the Arènes de Metz from 5 November to 11 November 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:
The following pairs received wildcards into the doubles main draw: