Speaking after the game, Buffon claimed that his side were all but out of the competition following the rout at the Juventus Stadium, but nonetheless praised the Portuguese prodigy and his teammates, who are seeking a third consecutive Champions League title and fourth in five years.
"Ronaldo is an extraordinary champion," the Italian legend is quoted by BBC Sport as saying. "Together with Lionel Messi he is the only one that punctuates his team's most important victories, and is to be compared to Maradona and Pele.
"We were playing against incredible champions. There is great regret and it will not be possible to go forward in this event, for me it is a great regret but against certain opponents it takes a clear examination: they are objectively stronger."
Ronaldo has 25 goals in his past 13 games for club and country.