Juve sealed a seventh successive Scudetto with a point at Roma on Sunday as both they and Napoli kicked off at the same time, but that was not the case in earlier weeks when the pressure appeared to get to Sarri's side.
Meanwhile, Maurizio Sarri's Napoli won 2-0 in Sampdoria to give them the meagre consolation of a new club record of 88 points.
"We work hard, but when it's time to celebrate after four extraordinary years, it's right that everyone celebrates".
Maurizio Sarri believes Napoli were psychologically affected by repeatedly playing after rivals Juventus in the Serie A title race.
"The greatest merit of the (Juventus) team was that they were always able to keep their calm because in football things can change in a second", Allegri added.
Nainggolan received two yellow cards in the space of five minutes and from the 68th minute Roma were down to 10 men.
"Juventus have a special mentality that has been built up through the years", Di Francesco said.
Dybala threatened early and broke through early in the second half after an Alex Sandro cross but the goal was disallowed because the Argentina striker was offside.
A number of players could leave Juventus at the end of the season, notably club captain Gianluigi Buffon, although the veteran goalkeeper has yet to confirm his retirement. "They are an example for other teams to follow".
When he returns, he intends to begin preparation to continue the Old Lady's success next season and confirmed there will be arrivals and departures during the summer transfer window. The defeat meant AC Milan secured their spot in the Europa League despite Atalanta scoring late to rescue a 1-1 draw in a bad-tempered match which saw a player from each side sent off in separate incidents.