Casemiro and Nacho join us for a special Real Madrid El Clásico-themed quiz edition of 'How Much Do You Know About...?'! Watch the two Real Madrid players go head to head about their knowledge of El Clásico as Real Madrid get ready to host Barcelona at the Di Stéfano. Do they know how many league goals Karim Benzema has scored against Barcelona? Can they remember how long it took Karim Benzema to score the fastest Clásico goal, or how many players from the current squad have scored against Barcelona? And most importantly... who knows more, Nacho or Casemiro? Join in on the fun and test your El Clásico knowledge in this hilarious Real Madrid video!