According to Calciomercato.com, Allegri confirmed he is happy to have Wojciech Szczesny lined up as Gianluigi Buffon's successor in Turin when asked about the possibility of Donnarumma joining Juve:
"Szczesny is Buffon's successor. I have already said this and I will repeat myself, we have a ton of faith in the Polish keeper. I really think that the Juve management made the right call when they decided to acquire him. Buffon and Szczesny have a great understanding as they respect each other very much so. Donnarumma is an AC Milan player, he still has a long road ahead of him. We are happy with our current situation."
Buffon, 40, is almost certain he will hang up his gloves at the end of the season:
Italy's failure to qualify for the World Cup finals will deny him the chance of signing off his career on football's biggest stage, but it's unlikely it will affect his retirement plans.
The legendary 'keeper has also discussed the possibility of Donnarumma making a switch to Juventus, and he believes the 18-year-old could do far worse.
"I do not live his situation but one thing is certain, if he comes to Juventus he's never wrong," he told La Gazzetta dello Sport (h/t AS). "I do not know the emotional connection that he has with Milan. What makes the difference is what vibrates inside your soul."
Donnarumma is one of the most exciting young talents in world football, and he appears the prime candidate to step into Buffon's shoes on the international stage.
Szczesny, though he's not a goalkeeper many would consider to be an elite figure among his peers, has reignited his career since departing Arsenal.
The Pole has made 11 appearances as Juve's No. 2 this season and kept seven clean sheets. Shortly before Christmas, he produced a superb performance against title rivals Roma in Juventus' 1-0 win, capped by a 94th-minute stop to deny Patrik Schick a dramatic equaliser.
Juventus writer Arjun Pradeep was impressed:
The 27-year-old's form has been promising, and he has a great deal of his career left, so he could make for a strong long-term replacement for Buffon even though he may never reach the same level.
As for Donnarumma, it seems the Bianconeri will not be among the many suitors he's likely to attract if he leaves Milan.