Mendy, 24, signed for the La Liga giants in July and heaps further pressure on Zidane's squad after midfielder Marco Asensio ruptured his anterior cruciate ligament and winger Brahim Diaz suffered a thigh problem.
Newspaper AS reported Mendy, who cost the Bernabeu outfit a reportedly €50 million, could miss up to four weeks.
Real have two remaining pre-season friendlies including Saturday's game against capital city rivals Atletico Madrid in New Jersey before the La Liga season begins on August 17 witRead More
