Buffon's replacement Wojciech Szczesny could get nowhere near Cristiano Ronaldo's bullet penalty as Real won 4-3 on aggregate.
Some have criticised Buffon, with Oliver's wife allegedly targeted.
"I'd never seen a human being with the courage to give a penalty in such a situation in the 93rd minute".
There are few more likeable and that, largely, is why there was such sympathy for a player who had been overcome by fury, who had clearly terrified Oliver and later claimed that he had "a rubbish bin for a heart".
"You can not ruin the dreams of a team".
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Del Piero told Sky Italia: "When [Buffon] spoke about the referee, I struggled to understand him".
"I am definitely sorry about that but I also know that I wasn't dealing with a person with a lot of awareness of feelings otherwise he wouldn't have made two big mistakes in the space of two minutes".
And the Italian legend said he still believes that 33-year-old referee Oliver lacked experience.
The Frenchman headbutted Marco Materazzi and was red carded in the 2006 World Cup final before Buffon's Italy beat France on penalties.
The Juventus captain has come under fire for a post-match rant in which he laid into Oliver.
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Buffon had to be restrained by his teammates before reluctantly leaving the pitch, marring what could have been his finest night as he had been given an ovation by the Bernabeu crowd after half-time.
Once again the Old Lady's boss seems to be going around the same idea that Buffon tried to defend himself with that somehow the reaction was fair simply because the Italian champions had made such an incredible comeback against Real.
Buffon said his words were of "a man who won't hide behind a veil of hypocrisy and instead throws out what is bubbling in his guts".
"In any case, this should not erase everything Buffon has done for football".
Having recorded a 3-0 win over the Italian side over a week ago in Turin, Madrid were favourites to go through the easily, but met a hard Juventus side in the second leg.
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