Achraf Hakimi, currently on loan at Borussia Dortmund from Real Madrid, has been ruled out for the rest of the season with a broken metatarsal.
The full-back has represented the Bundesliga leaders 28 times this season and in September won the Bundesliga Rookie award for his performances.
Widely heralded as one of the club’s star performers this season, such an injury could have implementations for Borussia’s title run-in.
Hakimi, 20, is primarily a right-sided defender who can also play in the heart of the defence and he has already amassed 14 caps for Morocco, including all three group matches at last summer’s World Cup.
Born in Madrid to parents of Moroccan descent, Achraf joined Madrid's youth setup in 2006 from CD Colonia Ofigevi as an eight-year-old, he is in the midst of a two-season loan deal in Germany.
Madrid currently have Dani Carvajal, Alvaro Odriozola and Nacho Fernandez to play in the right-back position.