Deployed in an unfamiliar left wing-back role, the Portuguese was entrusted by Ole Gunnar Solskjaer to stop the mercurial Lionel Messi.
Just a month after his 20th birthday, it shows just how highly the defender is rated.
Unfortunately for United, Luke Shaw’s own goal was enough to give Barcelona a 1-0 win at Old Trafford to put them in pole position to reach the Champions League semi-finals.
However, the Red Devils will be buoyed by their performance at home and their underdog victories in the back gardens of against Juventus and Paris Saint-Germain.
Dalot stood out for his bravery on the ball and willingness to drive forward – a complete contrast to the man who was in his natural position.
Ashley Young has become a dependable member of United’s defence in recent seasons but the right-back was caught out by the marauding runs of Jordi Alba from deep.
With former Liverpool hero Philippe Coutinho tucking inside, the Spain international bombed down the left flank at will and looked a threat.
Young’s unusually substandard performance highlighted to plenty of fans on social media that, at the age of 33, the England international may well require replacing.
And Dalot’s continued progression has led to many to call for his inclusion at Young’s expense.