The 2003 Open de Moselle was a men's tennis tournament played on indoor hard courts at the Arènes de Metz in Metz, France and was part of the International Series of the 2003 ATP Tour. It was the inaugural edition of the tournament and was held from 29 September until 5 October 2003. Fourth-seeded Arnaud Clément won the singles title.
See main article: 2003 Open de Moselle – Singles. Arnaud Clément defeated Fernando González 6–3, 1–6, 6–3
See main article: 2003 Open de Moselle – Doubles. Julien Benneteau / Nicolas Mahut defeated Michaël Llodra / Fabrice Santoro 7–6(7–2), 6–3