Inter conceded no goals in their last match against Udinese.
Mancini said: “It’s positive not to have conceded goals at Udine, also because usually sooner or later we do score a goal.
“For this reason we must concede less goals, be more careful at the back if we want to win.
“We have players in midfielder who know how to go forward and score, we must be better at taking advantage of these characteristics.”