Barcelona's 26-game unbeaten league run was ended abruptly on Sunday at the new San Mames Stadium when Athletic Club's answer to Leo Messi, Iker Muniain, scored in the 71st minute.
Could the reason for the defeat be the absence of the aforementioned Argentinian? Could it be that Bilbao happened to put in an excellent performance that deserved three points, regardless of Barca's personnel issues?
It's all down to what Spanish newspaper AS is calling "The Curse of the Catalan Flag" (in Spanish).
The Blaugrana have dropped points on the last five occasions they have worn their away strip—a tribute to the red and yellow stripes of the Catalan flag—which includes defeats against Athletic Club and Bayern Munich, and draws with Osasuna, Atletico Madrid and Milan.
While Barca fans dread the next outing in their away colours, here are five other jinxed strips...