Mancini praises inexperienced Italy side after England win
In a game of few chances at the San Siro, Italy looked more ambitious and settled the game through Giacomo Raspadori's 68th-minute strike.
The victory also gives Italy a chance of topping the group and making the playoffs, but they will need to beat Hungary in Budapest after the surprise leaders won 1-0 in Germany.
"It is very important, as it gives us a sense of calm to be top seeds for the draw, we also have the chance to top the group and (we) beat England, one of the best teams in the world," Mancini told reporters after the win.
Mancini opted to field a 3-5-2 formation against England, as opposed to the 4-3-3 that Italy have employed in recent years, but played down the importance of the tactical change.
"The system is one thing, but what matters is the character of a squad, the desire to attack and take control," Mancini said. "We still have a lack of experience in the side and some very young lads, but we played well today."
Italy, who have eight points from five matches, face Hungary on September 26.