Samu Castillejo struck for the Rossonero.
“We put in a very good performance, it's a pity we got distracted in that situation on their goal, because the team had controlled the game. It was a completely different Milan to the home match," Bonera told Sky Sport Italia.
“We're pleased with the team spirit, the way everyone is working together, the only disappointment tonight was the result.
“We're pleased that the young lads are coming through, as at times you need a little of that wild young spirit. It's a young Milan with some experienced figures like Simon Kjaer, who is giving a huge hand.
“Naturally, Ibrahimovic is a very important player, but the team has always tried to play the same way, with or without Ibra."