The Spanish outfit saw their 100% start to their European season ended in Italy, but the Brazilian has claimed that Barca can be "very satisfied" with the point.
"We knew it was going to be very difficult. Unfortunately we were not able to grab the three points as we wanted, but a draw must be seen as an important step towards the next round," Adriano told reporters at a press conference.
"We can be very satisfied also with the level of our performance. We kept possession for longer than Milan. We're improving match by match and this can give us an extra boost for our domestic games, too.
"The next Champions League game, at home against Milan, may be a defining moment for the group. I cannot say that we're strong favourites, but we will be playing at the Camp Nou."
Barcelona welcome Real Madrid in the league at the weekend.