Monaco have had a fall from grace since winning the Ligue 1 title in 2016, selling the likes of Kylian Mbappe, Bernando Silva and Thomas Lemar in that time.
One star player Monaco held onto is the France defender Djibril Sidibé, who helped his nation win the 2018 World Cup.
"I can't pretend I'm not worried," said the 26-year-old right-sided defender.
"It's got into our heads, me as much as any of the others," said Sidibe, who sat beside his manager Thierry Henry at the press conference ahead of Tuesday's Champions League game they need to win to qualify for the Europa League by finishing in third place.
"There are plenty of young players here and many off them have little experience.
"It'll be a high level match and we have to focus on winning it," he added.