Real Madrid have struggled this season, with their back-line looking shaky against both Barcelona and AC Milan as they conceded a remarkable seven goals in just two appearances recently.
Not just that, but the departure of Nacho has robbed the team of an extra reliable option in defence.
David Alaba, meanwhile, has been recovering from an anterior cruciate ligament (ACL) injury, while Jesus Vallejo is nowhere close to earning a shout in the XI. The fact that Carlo Ancelotti prefers defensive midfielder Aurelien Tchouameni in the heart of the defence over Vallejo speaks volumes...