On football pitches in Rome and throughout the peninsula, Italian children now say they want to support Argentina, "because (Juventus's Paulo) Dybala is so strong", or Belgium, "where Roma's (Radja) Nainggolan plays".
"It's been really tough and we have to compliment Napoli, as they kept the pressure on to the end and won at Sampdoria. It's hard to see these four years being repeated", Allegri said.
But Juventus did not take advantage of their advantage although Dybala did have penalty appeals.
"Juventus have a special mentality that has been built up through the years", said Di Francesco. "This anger and this desire to win has to be an example to all the teams". But on a club level Italy have had a good season, with Roma reaching the semi-finals of the Champions League and Juventus the quarter-finals, with Lazio going as far as the Europa League last eight.
Arkadiusz Milik curled a delightful effort into the top left corner in the 72nd minute, seconds after coming off the bench, while Raul Albiol headed in a corner eight minutes later.
Sampdoria president Massimo Ferrero went over to urge the fans to stop but was also insulted by the ultras.More news: Overwatch second anniversary event confirmed, free weekend incoming
"When the next season begins, we all start from zero points and must continue proving we are competitive".
Despite the impressive result, Crotone slipped into the relegation zone, below Spal on their head-to-head record.
Any one of five clubs could be relegated on the final day of the season. Juventus pulled six points clear of Napoli who were held 2-2 by Torino.
Douglas Costa sparked an emphatic comeback as Juventus virtually sealed the title with a 3-1 win over Bologna. "They have 90 million less, but three points more".