Atletico Madrid president Enrique Cerezo has stoked the rivalry with Real Madrid coach Jose Mourinho.
Mourinho mocked Atletico assistant coach Momo Burgos this week after their clash during Saturday's derby.
"Whose Burgos," shrugged Mourinho when asked about the confrontation.
Asked about the comments, Cerezo laughed: "Who is Mourinho? Celta's president? Oh, the coach of Real Madrid? I do not know him ..."