The Moselle Open (Open de Moselle from 2003 to 2010) is a professional tennis tournament played on indoor hard courts. It is part of the ATP Tour 250 series of the ATP Tour from 2003, The venue for the tournament was most recently the Arènes and was the Parc des Expositions de Metz Métropole from 2011 to 2013.
The tournament is one of the four French events of the ATP Tour 250 series, along with the Open Sud de France, the Open 13 and the Lyon Open.