Monaco - Russia international Aleksandr Golovin faces several weeks out after injuring his ankle during Monaco's 2-2 draw with Montpellier at the weekend.
Golovin limped off midway through the second half of Sunday's game with what the Ligue 1 club described as a "bruised bone with a micro-fracture" of the right ankle.
Monaco gave no indication as to how long the 22-year-old midfielder is likely to be sidelined, although he is expected to miss a number of weeks.
Golovin missed the first month of the season with an ankle problem after helping hosts Russia reach the quarter-finals of the World Cup.
He has started 13 of 24 league games for Monaco this season, scoring one goal since his 30 million-euro ($33.8 million) move from CSKA Moscow last July.