PSG fans will be furious that they were not given a penalty that would've given them the chance to get back into the Champions League final against Bayern Munich.
The Frenchman was brought down inside the box in the second half with PSG 1-0 down, but the referee was quick to wave it away, pointing at the ball.
On the replay, it was clear that Kimmich had actually come through the back of Mbappe, catching the back of his foot.
There wasn't much of a protest from Mbappe or his PSG team-mates, but they should feel aggrieved that they did not get a penalty from the incident.
The fact that it was waved away so quickly, and that there was no check by the VAR system will only serve to add to PSG's frustrations.
The Champions League final was an unexpectedly quiet affair, considering the two teams had scored 69 goals between them in the campaign up until the final.
Kingsley Coman broke the deadlock just before the hour mark, and although PSG did push for an equaliser, they couldn't find enough quality in the final third before full time.
Other than the penalty incident, Mbappe was kept quiet, as was Neymar, who had a lot of expectation riding on his shoulders going into the game.
Goalscorer Coman went down in the box in the first half, although VAR was correct not to be interested on that occasion.
Late on in the game, Bayern's Robert Lewandowski had a penalty shout of his own denied, but that was forgotten as a few moments later the final whistle was blown.
Bayern Munich are champions of Europe for the sixth time, and the win completes the treble including the Bundesliga and the German Cup this season.