Television station Cuatro has transcribed a conversation between the two players during warm-up ahead of Spain's World Cup qualifier against Belarus on Friday.
Reina: "I guess it's not so bad. How many games could you play? 10, 12 (in reference to the number of games Casillas would play this season for Madrid in the Champions League)? But at the end of the day, it's a pretty shitty season. So [you should leave] because you're going to play 10 or 12 games at most."
Casillas: "Yes, but leave now? I don't think so, mate. At least I get to play the Copa del Rey..."
Casillas has been at Madrid all his career.