La Blaugrana has a tendency to be complacent at times during their matches especially after victories. As a Barca supporter, I attended the friendly match against Chivas of Guadalajara in the year 2011.
It was expected that La Blaugrana would defeat Chivas of Guadalajara in Miami, Florida. Barca appeared to be overconfident about its victory before and during the match.
Gerard Pique was interviewed the day before the match in the Univision program "Despierta America" by one of their hosts, Satcha Pretto. While it is great that Barca enjoyed Miami, Chivas of Guadalajara was nowhere seen.
On the day of the match, Chivas of Guadalajara came from behind and snatched victory from Barca in front of more than 70,000 spectators. The match was a horrible showing of complacency.
The moral of this slideshow is the following: Complacency is the worst fear since it can defeat a team from within.