After losing 2-0 in Milan at San Siro last week there was an extra tense atmosphere inside the the home of Barcelona before the game.
Lionel Messi's early goal settled some early nerves and from there Barcalona went on to become the first team in the modern Champions League era to overcome a two-goal first leg deficit with any away goals.
Playmaker Xavi, who has seen many memorable nights in the Champions League at the Camp Nou, told Canal Plus that he had not witnessed such an atmosphere in years.
"The fans were ten out of ten. It was a marvel. It is a long time since we saw the Camp Nou this intense, this excited. Leo's goal at the start was good for us, we got that positive momentum going," he said.
"We moved the ball really well, pressed them up top, we played an exceptional game. We wanted to be in the quarter-finals and we achieved that."
Jordi Alba, who clinched the game in injury time, told the Spanish TV station that the entirety of 'barcelonismo' had suffered during the game.
"This is a very important victory for us, there was so much at stake," Alba explained.
"We were suffering a lot in the final minutes of the game. Milan were looking for a goal."
The former Valencia player said that, overall, Barcelona's performance was very complete. Alba made clear the club fear no side remaining in the competition, and insisted they would not be phased by two more Clasicos against Real Madrid.