PSG started on the front foot from the opening kick sending a message of their intent.
In the third minute, Ezequiel Lavezzi produced a magical strike off his left boot into the top corner beating goalkeeper Petr Cech. There was nothing the Chelsea man could do about it.
The hosts then took a far more passive approach after the opening goal. Looking for a chance on the counterattack, the French giants dropped a little deeper and Chelsea began to get a foothold in the game.
It was an invitation for disaster. Center back Thiago Silva made the dubious decision of going in on Oscar in the box and missed everything but the player.
Eden Hazard, a familiar face to those in France from his time at Lille, slotted home from the spot to give the Blues a vital away goal and draw level.
The second half got off to a rather dull start. Both teams not wanting to make a success that could ruin the tie, played it about cautiously.
In the 61st minute, it was Lavezzi again at the center of the action.
He delivered in a peach from a free kick that ended up in the back of the net last touched by Chelsea midfield player David Luiz to give the French side a 2-1 lead.
Zlatan Ibrahimovic was forced to go off shortly afterwards in what looked like was a hamstring issue. In his stead, Lucas Moura was brought on and showed a lot of life down the right flank.
Edinson Cavani nearly made it 3-1 in the 84th minute with a chance coming in from the left. The football sailed wide of the post, much to Chelsea’s relief, though.
When it all appeared done and dusted, Javier Pastore had other ideas. Taking the ball from a throw-in on the right, he dribbled through the sleepy Blues defense and beat Cech on the near post.
Chelsea will have the opportunity to turn around the scoreline in a week, but the two-goal advantage will prove to be a challenge.