De Agostini was a tactically versatile and hard-working
defender, who could play on the left, or even in the
centre of his team's defensive line, although he was capable of playing anywhere along the left side of the pitch, due to his ability to cover the flank effectively and assist his team both offensively and defensively. He started out as a
forward, but he was primarily deployed in the role of an attacking
left-back or
wing-back throughout his career, due to his pace, stamina, marking,
crossing, positional sense, technical ability, and his capacity to read the game. He was also capable of playing anywhere in
midfield, and was frequently used on the left
wing, as well as in the
centre on occasion, either in a
box-to-box role as a
mezzala, or even as a
defensive midfielder, due to his anticipation and tenacious style of play. In addition to his defensive attributes, De Agostini was known for his eye for goal and striking ability from distance, and was also an accurate
free kick and
penalty taker; with 33 goals in Serie A, he is one of the league's most prolific defenders ever. Beyond his playing ability, he also stood out for his professionalism throughout his career. ==After retirement==