The goalkeeper told Radio Marca: "The spirit here is tremendous. We have players here with great ambitions. This team has nothing to do with Capello.
"No-one feels isolated and no-one is assured of their place. There has been a radical change in the team. If we suffered it is because we are a new team, but the dynamics are good. You won't begin to see the real team until October."
On Sunday's victory at Getafe, Casillas added: "They deserved to win. They were stronger than us, but we were more decisive when needed."