Monaco head coach Leonardo Jardim accepts he may be unable to keep Thomas Lemar at the club during the January transfer window.
Vice-president Vadim Vasilyev and Jardim have previously been clear that Lemar and other Monaco stars including Fabinho will not be allowed to leave mid-season.
Jardim stressed again that Monaco do not typically sell players in the January transfer window, but the coach understands a large bid for Lemar would give his side a decision to make.
"We are not used to selling in the winter," Jardim told reporters on Monday.
"But the transfer window lasts until the end of the month and many things can happen."
Jardim suggested fringe players could be allowed to follow Terence Kongolo and Soualiho Meite by leaving Monaco on loan.
"Maybe a few who play little will be able to find time for play," Jardim added.
Lemar has been included in Monaco's squad for Tuesday's Coupe de la Ligue quarter-final at Nice, but striker Radamel Falcao is out with a calf injury.