Swedish striker Ibrahimovic drove in two goals as the French capital side beat Leverkusen 4-0 in Germany on Tuesday night, suggesting the second leg on March 12 should be a formality.
His first was a penalty and the second a 20-yard left-footed rapier strike to the top right corner, and Ibrahimovic acknowledged PSG had built themselves an ideal platform.
Blaise Matuidi scored in the third minute and Yohan Cabaye netted the fourth goal of the night in the closing stages as the Ligue 1 champions overwhelmed their hosts.
"I think we had a good start," Ibrahimovic said on Paris St Germain's website after the game.
"After three minutes we scored a goal, then we played our game, created chances and scored a second and a third, so there were a lot of spaces to play and we did good, very good.
"We have to play the second leg like we did today.
"We have a big advantage absolutely, but still we have to be focused and play our game and let's see what happens in the second game."
Head coach Laurent Blanc believes those at the BayArena saw the best football PSG have to offer.
"We reproduced the kind of soccer we were playing in the first half of the season," Blanc said.
"Obviously I am very happy with the performance. We witnessed, in my opinion, a great team.
"I'd like to congratulate everyone, from the players that started and those that came on, to the entire squad. We can count on everyone."