AC Milan fullback Davide Calabria insists they can be happy with their 0-0 draw at Borussia Dortmund.

Calabria says they can be under no illusions over the difficulty of their Champions League group after learning of Newcastle's 4-1 win against PSG.

“We played our game against a strong team that was playing on home turf, where they are unbeaten in this competition for two years," Calabria said.

“This is one of the most difficult groups in the history of the Champions League.

“It is tough to talk in the heat of the moment, I would prefer to wait, cool down and then analyse what happened," added the captain.

“There were several technical errors and we must be more clinical when we create those chances. At this level, you cannot waste that much."