Iker Casillas's epic dig at Jose Mourinho

Jose Mourinho responded a few days ago to some comments from Iker Casillas, in which the goalkeeper said that if he could go back to the Real Madrid era, he would have taken on the coach who 'bullied' him.

Mourinho responded to Record, saying "these are quotes from someone who is at the end of his career."

However after Man United lost 3-1 at Liverpool, Casillas has hit back on Twitter.

"According to a Portuguese newspaper someone said that a player like me, 37, is at the end of his career. I completely agree! My question, for this newspaper is: In the case of coaches, when and in what moment do they see that they are no longer fit to coach a team?"

Según un diario portugués alguien dijo que un jugador como yo ( 37 años ) está al final de su carrera. Completamente de acuerdo!Mi pregunta es,para ese periódico:
En el caso de los entrenadores, cuando y en qué momento se ve que ya no están para dirigir un equipo o entrenar?

— Iker Casillas (@IkerCasillas) 16 de diciembre de 2018