The Complete Defender: Why Kalidou Koulibaly Is the Perfect Centre-Back for Barcelona

​When a club is as historically successful as Barcelona, even one poor result seems to be the beginning of a crisis. Fans have already suggested that the club is in a challenging period, with many questions being asked of their defenders. The club have kept just three clean sheets in La Liga this season. Ahead of Sunday's 2-0 victory over Villarreal, the Blaugrana had failed to keep a clean sheet in 11 consecutive matches. PS....based on how barcelona's defence is, champions league is up for... Via All the latest breaking football news, transfer rumours, analysis, and match reports - 90min http://www.90min.com/