If you had spoken to anyone after watching the first half, they definitely wouldn't have predicted that Arsenal would turn it on to win 5-1 against PSG.
Although the French team were quick of the mark, they were unable to convert in the first ten minutes, which may have been the start of their downfall.
Georgen and Rabiot were strong down the wings for PSG, and they were able to create chances for their teammates, who were unable to provide the finishes.
Arsenal's first goal came completely against the run of play.
A long ball to Aubameyang gave him enough time and space to cross, with Ozil pouncing back post to put the ball in the net.
PSG looked shaken following the goal, and weren't able to keep up their dominance in possession which they'd enjoyed in the first ten minutes.
Buffon made some vital saves to keep them in the game, which arguably should have been put away by the Arsenal forwards.
The first-half finished with neither side being able to break the other down.
PSG looked like they had a talking to at half-time, because they started the half much brighter.
In minute 60 they were gifted the opportunity as they were awarded a rather dubious penalty.
Nkunku made no mistake in coverting, putting the two teams level.
Only six minutes later, Arsenal were able to go ahead again. This time, a looping cross was tapped in by Lacazette.
He promptly doubled his goal tally just 8 minutes later, when a corner took a deflection, giving him the opportunity to head it in back post.
It looked unlikiely that PSG would have an impact in the last 15 minutes, as Arsenal were running the show.
Two more goals inside the last ten minutes rubbed salt in the wounds, and left PSG with a 4 goal deficit.
Final score: Arsenal 5-1 PSG.
A result that Arsenal players, and especially Emery, will be pleased with.