Juventus goalkeeper Gianluigi Buffon has said he believes Roma and Napoli will make this season's Serie A title race one of the closest for years.
Champions Juve host Roma on Saturday with four points separating the teams, currently first and second in the table.
Napoli are a further four points behind, but Buffon said he could not imagine that gap becoming much bigger.
"I think Roma have a good identity and they are changing the way they deal with certain situations," he told Mediaset.
"I rate their coach and they have a competitive team with world class players. They are going to be in contention with us to the end, and with Napoli.
"It's no coincidence that Juve, Roma and Napoli have always been the sides fighting for the title in recent years."
Winning a sixth straight title is Juve's minimum goal, with Champions League glory the ultimate aim.
They have been drawn against Porto in the round of 16, and Buffon said: "It's pointless trying to deny that it could have gone worse. I think it's only honest to admit that.
"We are the favourites, but we have still got to prove that out on the field. We respect Porto a lot because they have knocked out Roma, among others, so they have quality."
After Porto, the Old Lady would still have a further three hurdles to cross to win the competition and become what club president Andrea Agnelli called "legends."
La Gazetta dello Sport reported him as saying at Juve's Christmas dinner: "We have two roads open to us, domestically and in Europe.
"Nobody has written their name down as champions of Italy six times in a row, and to do that as the champions of Europe would really make us legends."