Marcelo was forced to leave Real Madrid's match against Villarreal with a calf injury, and the Brazilian defender could miss two weeks, meaning that he will miss the crucial away game in Dortmund against Borussia.
Real Madrid's lack of depth on the left-back position could be very worrying, as Zidane will be forced to play either Danilo, who is a right-back, or Nacho -- a center-back -- at least until backup Fabio Coentrao comes back from injury. Los Blancos knew that the situation could be dangerous but still decided to stay put in the transfer market.
Madrid will play at Las Palmas this Saturday and they will face Dortmund next Wednesday, two away games that could be very important down the road. Las Palmas have been quite surprising this season and should be a dangerous team to beat at home, while Dortmund have impressed and their home-field advantage is a force to be reckoned with.