Spanish newspaper El Confidencial suggested Casillas was the one who informed Marca about Sergio Ramos' decision to wear Mesut Oezil's shirt under his own in the second half of their 5-1 win over Deportivo La Coruna at the weekend to support the Germany international.

But Casillas has laughed off the suggestions.

"According to some article I'm a snitch. Yes, of course, I am a snitch!" Casillas sarcastically retorted on his official Facebook page.

"And by the way, I am also the one behind the Faisan (ETA tip-off) case. And that's not all, I was also the snitch in the Watergate case...

"The things you have to read... Laughable."

Ramos wearing Oezil's number 10 under his own jersey was seen by some as an act of rebellion against coach Jose Mourinho, but the defender insisted he was only supporting his team-mate.