They are targeting the final which will be held in their own stadium in Madrid on June 1. Dealing with the pressure of Atleti will be key, and this team didn't do that in the first leg.
The home side thought that tactic had paid off early when captain Giorgio Chiellini poked home in the fourth minute.
Ronaldo nearly scored when his long-range free kick forced Atletico goalkeeper Jan Oblak to make a hard save in the ninth minute.
Ronaldo, jeered almost every time he touched the ball, had a quiet performance in his first match in the Spanish capital since leaving Real Madrid last summer.
"The King of the Champions League", one fan wrote on Twitter.
He also became the first player in history to score 125 UEFA club competition goals. Joao Cancelo put in a cross from the right and although Oblak clawed Ronaldo's header out from under his crossbar, goal-line technology confirmed the ball had crossed the line.
With four minutes left, Bernardeschi powered into the Atlético area, was pushed in the back by Angel Correa and Ronaldo blasted home the penalty.
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"Godin is fine, he'll train today and I expect him to play tomorrow".
It was perhaps a surprise that Diego Simeone's Atletico were overwhelmed so easily.
"The Spanish league is more open, the teams risk more, the priority here is to defend well and then attack".
It was expected they would concede the lion's share of possession, but on the rare occasions they did have the ball the three-time finalists were both pedestrian and sloppy.
"These are two different matches, the first leg and second leg".
Juve are yet to lose in 27 league games to date this season, and the defeat in Madrid came amid a run of five successive domestic victories. Atletico Madrid now lead the tie 2-0 after they won the first leg in Madrid.
Atletico failed to have a shot on target in a Champions League game for the first time since December 2008 v Marseille.