"It's painful because no one expected this after the advantage we had but you realise what the reality of the Champions League is like when you do things badly, when you make lots of errors, when you don't adapt to the game", he said.
"I don't understand why they protested the penalty", Ronaldo said.
There have been calls for Buffon to apologise for his reaction, with Oliver's wife having received vitriolic messages on social media, but Zidane felt the veteran goalkeeper simply lost his cool.
But Ronaldo, in his 150th Champions League appearance, then netted his 120th goal in the competition by converting the penalty with a firm shot into the top corner.
This game, played during the 1998/99 season, is believed to have been a dramatic high point in the history of the Champions League playoffs. It was his header that Lucas was about to control when Benatia was adjudged to have fouled the Madrid man six yards from goal.
The Croatia striker headed a second at the far post in the 37th minute when substitute Stephan Lichtsteiner provided the cross from the right.
"Real Madrid could have scored more goals today, but Juventus and Buffon were great".
"The champions survive the resistance", proclaimed Spanish newspaper Marca, also repeating late Real midfielder Juanito's famous line: "93 minutes at the Santiago Bernabeu is a very long time". During the game, Benatia and the rest of them had already been kicking us from behind.
The match looked destined for extra time until the referee's penalty decision.
I knew we would be up against it, but I didn't expect what happened in the first minute.
"We could've scored five or six goals, so we ought to be proud".
"I have seen some of their games, it's surprising they are bottom of the table, but our aim is to go there and win".
The victory means that the European champions have now made it to the Champions League semi-finals for the eighth consecutive season, a record for the competition. Los Blancos are favourites to left the trophy for a third consecutive campaign.