Paris Saint-Germain ran out 2-0 winners in the Champions League last-16 first leg at Old Trafford, handing Manchester United caretaker manager Ole Gunnar Solskjaer his first defeat since taking over from Jose Mourinho.
United midfielder Paul Pogba was sent off late on and will miss the return leg in Paris.
After a heated first half, the visitors were clinical with two quick-fire goals; first Presnel Kimpembe turned home at the far post from an Angel Di Maria corner in the 53rd minute before Kylian Mbappe finished off from another Di Maria assist in the 60th, giving United a huge task to overcome.
It would have been more but for some fine goalkeeping from David de Gea, but matters were made worse when Pogba was dismissed late on for a second yellow card, meaning he will miss the second leg.
United registered just one shot on target as Solskjaer was defeated having gone unbeaten in his first 11 games, meaning an uphill task in the second leg at Parc des Princes on Wednesday, March 6.
There were five yellow cards in a fiery first 45 minutes as both sides cancelled each other out, but the best of the chances did fall to the visitors. Former United midfielder Di Maria curled wide from range early on, before Mbappe slid in to poke wide under pressure from De Gea after being played through on goal by Julian Draxler.
On a yellow card, Young then nudged Di Maria out of play and into the railings at Old Trafford, prompting anger from the PSG players, but Italian referee Daniele Orsato kept his second yellow card in his pocket on this occasion.
Solksjaer’s plans were impacted when Jesse Lingard, just before half-time, and Anthony Martial, at the interval, were forced off with injuries, introducing on Juan Mata and Alexis Sanchez, while De Gea was at his best to turn away Mbappe’s header moments before PSG’s opener.