It was a dramatic finish at the Santiago Bernebau in the second leg of the quarter-final clash and in spite of losing 3-1 on the night, Real Madrid went through to the final four, beating Juventus 4-3 on aggregate.
Ronaldo's victor, which meant a 3-1 defeat on the night but a 4-3 aggregate victory, means Real edge one step closer to claiming a third consecutive European triumph, and fourth in five years.
But Juve's three goals on Wednesday meant Ronaldo's heroics were again required for Madrid. It was so almost the most remarkable comeback in recent memory from the Italians, however Real Madrid survived the scare and progressed winning 4-3 on aggregate.
Prior to the game, Ronaldo shared the record with Lionel Messi, who has scored nine goals against Arsenal in the Champions League. Either way, the referee called it and we can not change it, but I think it is a penalty and that is it. "Lucas was tackled from behind and if they don't give him the penalty, it's a goal". "I'm happy and proud of how we played, we made the impossible possible".
A veteran of 159 Champions League matches, Buffon chose the wrong time to abandon his better judgement and it would be a sad thing were this to be his final performance in the competition. "I had two more substitutions planned for extra time and I was confident we could do it".
With Barcelona and Manchester City dispatched already, Real Madrid may yet look back on this quarterfinal as the enabler for a third straight Champions League title.
The penalty came as Vazquez was in position to score in front of the goal after Ronaldo headed down a cross into the area. It was a moment of confusion when he (Oliver) called it.
"They told me it was a penalty", he said. A Sami Khedira cross found Mario Mandzukic on the far post and the Croatian had no problems in heading it into the back of the net to give the Bianconeri hope.
A routine cross from Costa on the right hand side was seemingly swept up by Navas in the Madrid goal in what looked like a routine grab.
Juventus took advantage of Madrid's depleted defense, which had 21-year-old Jesus Vallejo playing alongside Raphael Varane.
If it was not for the heroics of the goalkeeper, the La Liga giants could have been behind by more in the first 45 minutes, when he stopped former striker Gonzalo Higuain from finding the net.