Outclassed 3 - 1 by Barcelona in Berlin last May and ousted from Europe 's premier club competition by Bayern Munich in a tight , last 16 tie decider earlier this season .
Juventus have plenty of faith in Allegri .
Although outclassed 3 - 1 by Barcelona in Berlin last May and ousted from Europe 's premier club competition by Bayern Munich in a tight , last 16 tie decider earlier this season , Juventus have plenty of faith in Allegri .