
The footage, aired by Spanish television station Cuatro, shows the two players arguing over Guti's positioning for a Sevilla corner after 72 minutes of the game.
Sevilla were already leading 2-1 at that stage, in what turned out to be the final result, and consequently Madrid's first defeat of the campaign.
"What are you doing there, alone?" asks Casillas of Guti, who stood isolated at the front post, before stating, "There is nothing there. There is nobody there."
"There are four [Sevilla players] there," responded the midfielder, pointing behind himself, then asking "What?" on several occasions before saying to his team-mate: "shut your mouth". (mahjoob)