The Catalans conceded four goals for the second successive match and their hopes of winning all six titles in 2015 are in serious doubt after their dressing down at San Mames
The warning signs were there on Tuesday. Barcelona beat Sevilla 5-4 in a thrilling UEFA Super Cup clash in Tbilisi to take another step towards claiming the sextuple this year. But on Friday Barca let in four once again - and this time it didn't score any at all.
Whichever way you looked at it, this was a mess at San Mames for the treble winner.