Del Piero thinks the 22 - year - old needs time to mature in order to cope with the demands that come with the famous shirt .
Del Piero left Juve in 2012 and retired in 2014 .
Del Piero , who left Juve in 2012 and retired in 2014 , thinks the 22 - year - old needs time to mature in order to cope with the demands that come with the famous shirt .