Dybala, who was given a standing ovation when he was substituted nine minutes from time, broke the deadlock in the seventh minute and doubled his tally in the 22nd. Giorgio Chiellini added the third, 10 minutes after the break.

"We need to be happy with all we have done, but we need to keep our feet on the ground because we still haven't achieved anything," Juventus coach Massimiliano Allegri said. "It's not over, we'll need to play with bravery again ... but we know the weaknesses of Barcelona and also our strengths."

The result will give Juventus plenty of confidence heading into the second leg on April 19, but it will be wary of another fantastic comeback from Barcelona, which beat Paris Saint-Germain 6-1 in its last match to become the first team to overturn a 4-0 first-leg loss in the history of the competition.

"The sensation is that we are living through another nightmare," Barcelona coach Luis Enrique said. "We gave away two goals in the first half and against a team like Juventus you pay for it. As a coach it's very difficult to explain, Juventus was superior to us in every way. I'm responsible 101 percent ... (and) I don't want to talk about a comeback."

But he added: "Certainly, if we get back to our level we can score four goals against anyone."

The other first-leg match between Borussia Dortmund and Monaco was called off and rescheduled for Wednesday after three explosions went off near the German team's bus as it set off for the match, injuring defender Marc Bartra.

Allegri again used his daring 4-2-3-1 formation, which has seen his team play some of its best soccer of the season as it utilizes all five of its star attackers.

Juventus was aggressive from the start and almost scored in the third minute when Gonzalo Higuain's header from a free kick taken by Miralem Pjanic was dropped by Marc-Andre ter Stegen, but the Barcelona goalkeeper recovered in time.

However, the hosts did take the lead four minutes later when Juan Cuadrado pulled a cross back from the right flank for Dybala to curl the ball into the bottom left corner.

Messi was largely kept quiet all night, but he provided a superb ball over the top for Andres Iniesta, whose effort was turned around the right post by Juventus goalkeeper Gianluigi Buffon.

That save proved pivotal as Juventus doubled its lead moments later when Mario Mandzukic's cross was deflected to Dybala, who drove a first-time shot into the left of the goal.

"Paulo had a great game but the whole team had a great game, those who started and the substitutes," Allegri said. "It was a great victory, achieved by everyone."

Barcelona thought it had pulled a goal back on the half hour, but Messi's strike was ruled out as Luis Suarez had strayed offside.

Juventus had several chances to extend its lead and finally did so when Chiellini headed in a corner off the inside of the left post.

Suarez almost got a crucial away goal for Barcelona in the 67th but his effort hit the outside of the left post.

Barcelona should have had a penalty, moments later, when Chiellini handled the ball in the area but nothing was given.

Juventus also had reason to feel aggrieved by refereeing decisions, as Cuadrado had a goal ruled out for offside - but television replays indicated it should have been allowed.

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