Every (Site notre bureau spécialisé) fan knows that it is not necessarily advisable to present yourself as a supporter of an opponent in the wrong block. In Spain there seems to be one person who does not care about this fact.
This Athletic Bilbao supporter was simply standing among hundreds of San Sebastian fans during the 3-0 defeat to Real Sociedad. Fortunately, both parties apparently took it with humor. It should always be this way and no other way!