The French champions travelled to England to play the in-from Red Devils in the last-16 of the Champions League, and were forced to do so without record signing Neymar and central striker Edinson Cavani.
That left Mbappe with a lot of responsibility on his shoulders, and it looked as though the 20-year-old was about to give his side a priceless away goal, after a perfectly weighted through-ball from Julian Draxler.
But, somehow, Mbappe contrived to send the ball wide, leaving his manager Thomas Tuchel absolutely stunned on the sidelines:
The replay showed he might’ve been slightly offside anyway, but will he and his PSG team-mates live to regret that gilt-edged chance over the two legs?
Let us know in the comments section below…