Bernardo Silva's 11th minute strike has given AS Monaco a 1-0 lead over Reims at half time.
The Portugal international headed in from Nabil Dirar's cross to score his 12th goal for Monaco.
Nicolas de Preville then missed the target before Frederic Bulot's shot was saved in a rare foray forward for Reims.
Guido Carrillo came inches away from doubling the lead when his header hit the left post.
Dirar and Mario Pasalic both missed the target before the break in a dominant first-half performance from Monaco.
