6 of the best: Contenders to Bayern Munich's European crown

3. Barcelona

Despite reaching the semi-final stages last season, much of Barcelona’s year was disrupted by Tito Vilanova’s battle with cancer.

The heavy defeat at the hands of eventual winners Bayern was typical of their lacklustre performances (by their high standards) throughout the Champions League, which included the defeat to Celtic.

The new season under new coach Gerardo Martino has started well though, with Barcelona top of the Primera and sporting a perfect record after four games. Though there are question marks when it comes to their defence, scoring against them requires the opposition to have the ball - which is no mean task.

The summer addition of the Brazilian, Neymar, means Martino’s side can boast one of the most potent attacks in world football.