Federer, who has claimed four Australian Open titles himself, believes Kyrgios isn't experienced enough to go the full length.
"To win, he drops, in my humble opinion,'' Federer told Fairfax Media.
''To do anything, yes, first week no problem, but to go all the way it's a long way, and he's never been into a semis before, so first he has to prove to the world and himself that he can make the semis.
"So for me to start talking about him winning the tournament, Lleyton [Hewitt] never did it, and he was two times world No.1 at the end of the year.
