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The Italian champions broke the deadlock four minutes before half time when Pogba found the top-left corner from 35 yards.
Pogba doubled his side's advantage on 66 minutes, collecting the ball from Arturo Vidal before firing into the bottom-left corner from 25 yards.
Vidal was the provider again six minutes later, as he found Vucinic, who drilled home from close range.
Matri then netted his third goal in as many games to seal the emphatic win 10 minutes from time.