Defending champion in the singles was Jo-Wilfried Tsonga , who also reached the final this year. There he was defeated by his compatriot Gilles Simon with 4: 6 and 3: 6. In doubles, Nicolas Mahut and Édouard Roger-Vasselin competed with other partners to defend their titles. Mahut was able to reach the final again, which he lost at the side of Jo-Wilfried Tsonga in straight sets against Raven Klaasen and Johan Brunström .
The field of participants in the single competition consisted of 28 players, that of the doubles competition consisted of 16 pairs. The four top seeded players each received a bye into the second round.
The qualification for the Moselle Open 2013 took place on September 14th and 15th, 2013. Four qualifying places were played, which entitle them to participate in the main draw of the tournament.
At the Moselle Open 2013, the following prize money and world ranking points were paid out or credited for reaching the respective round. Players who entered the main field from qualification received the specified qualification points in addition to those for reaching the respective round. Otherwise the amounts are not to be understood as cumulative. The amounts for the double competition were per player.