Thomas Lemar is out of Monaco's Champions League game against RB Leipzig through injury.
The France international is not in Leonardo Jardim's 21-man squad for Wednesday's away fixture, which will open their campaign in Group G, due to a thigh problem.
Lemar had to be substituted at half-time of Monaco's humiliating 4-0 away defeat to Nice in Ligue 1 on Saturday and has not been passed fit to play.
The squad for the Leipzig clash does include in-form striker Radamel Falcao and new signing Keita Balde, who is yet to make his debut after his move from Lazio.
Monaco, semi-finalists in last season's competition, are top seeds in an open group that also contains Leipzig, Porto and Besiktas.
Lemar, who rejected a deadline-day move to Arsenal and reportedly drew interest from Liverpool, has been an ever-present for Monaco's five Ligue 1 matches in 2017-18 and has two assists to his name.