We'll be talking to Graham Hunter about this tonight and he summed the situation up perfectly on Twitter last night...

Brutal, horrible, disgusting monkey chants at Marcelo by the Atletico fans while he & the other Madrid subs do their warm down. Inexcusable

— Graham Hunter (@BumperGraham) February 5, 2014

His kid comes on the pitch & runs to his arms while these fools sing "hope your dad dies". This isn't football as I know it. Rotten to core

— Graham Hunter (@BumperGraham) February 5, 2014