Both teams started the game at Old Trafford brightly with United's only shot on target coming in the first 45 minutes from Marcus Rashford.
"That is the level we want to get to".
Marquinhos' versatility, which enables him to play in midfield or in the heart of defence, may come in handy for the second leg as the Parisians may look to sit deep and frustrate Manchester United at the Parc des Princes. However, the tempo of their play dropped significantly following the restart and they were deservedly punished. This considered, United's frustration that the referee then made a decision to send Paul Pogba off (he'll now miss the return in Paris) for a second bookable offence in the closing stages was obvious.
United tried to find another way through by putting crosses into the PSG box but Thiago Silva and Presnel Kimpembe, two of the French side's centre-backs, took up some fantastic positions and dealt with every single ball.
"No, we played on our strengths".
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There was an irony that Angel di Maria was one of PSG's most effective players.
Booed and jeered by a normally magnanimous home crowd, Di Maria's speed and skill stung as he put his former employers to the sword.
The ex-Arsenal manager was working as a pundit for beIN Sports on Tuesday night and he pinpointed exactly how PSG were able to quell Man United's biggest threat.
While PSG had the better players, you also have to give credit to their coach Thomas Tuchel because he got his tactics absolutely spot on too.
By virtue of a superb second half showing, PSG earned their first win against an English side in Europe since beating Chelsea 2-1 in March 2014.
"We grew again in this match", said Tuchel.
Maybe they can do the same in Paris, but few are expecting it after the reality check dished out by a team who have been built to win the Champions League. "To defend like that and not allow chances. If we get to half-time with a one-goal lead, that is what we have to aim for".
Marquinhos was excellent for the men from the French capital against United.