The Spanish striker believes that the 34-year-old shot stopper is a liability for the Rossoneri and says that the Blaugrana can win the continental tournament
The Camp Nou outfit host the Serie A champions in the second leg of their quarter-final tie following a goalless draw at San Siro last week.
And Bojan, who left Barca for the Italian capital in the summer, has offered his knowledge of the Serie A champions to the Blaugrana.
"Milan's weakness is their goalkeeper Abbiati," Bojan told Radio Catalunya.
"I have discussed the match at Camp Nou with my team-mates and we all agree that if there is one side who can break through Milan's defence, it is Barcelona.
"I see Barca winning the Champions League and La Liga."
The Spain international has scored five goals in 26 Serie A appearance for Roma in 2011-12.