Kiev: The Paris Saint-Germain shot-stopper has only been capped twice by the Azzurri, but maintained that he has no qualms about playing second-fiddle to the Juventus goalkeeper.
Buffon has been in inspired form in the European Championship, making a number of key saves, whilst also saving an Ashley Cole penalty in the 4-2 shoot-out victory over England in the quarter-final.
Sirigu insists that Buffon remains a key figure - not only for him as a goalkeeper, but for the entire squad as a leader.
"His most important quality, before being a great player or a great captain, is that Gianluigi [Buffon] is a very down-to-earth man," the 25-year-old told RMC Sport.
"It`s nice, he is amiable. He is the person who solves problems, who comforts us, that`s a reference point in the group."
Cesare Prandelli`s men encounter Spain in the Euro 2012 final in Kiev on Sunday.