Sergio Ramos has reopened old wounds with Manchester United manager Jose Mourinho.
Mourinho spent three years at Real Madrid from 2010, infamously falling out with a number of players before his departure for Chelsea in 2013.
The Portuguese dropped Casillas from the starting line-up towards the end of his managerial tenure at the Bernabeu, a decision which was met with widespread criticism.
And Casillas finds himself in a similar situation with Porto where, now at the age of 36, he has not started any of the club’s last seven matches in all competitions.
“It’s a situation that catches my attention, it surprises everyone,” Ramos told El Larguero of his former teammate’s situation.
“If there is something personal behind this, that I do not know.
“I wish him to be happy wherever he his and you should not lose your joy. The day you lose it, you will have a problem.
“We are always in touch with jokes and nobody likes to be a substitute when they’ve always been a starter.
“I ask him if the coach is Mourinho’s friend!
“I would not be surprised, I’ve seen this coach at a press conference and he has similar traits to Mourinho.”