United began as if they meant to have the game wrapped up by half-time and Southampton were indebted to Angus Gunn for three saves in the first six minutes that prevented the home side from taking an early lead.
This was a victory hewn directly from the bedrock of the Manchester United philosophy and principles instilled in the club during the quarter-century when Ole Gunnar Solskjaer's mentor Sir Alex Ferguson was in charge at Old Trafford. Indeed, the symbolism of this... Major first-team stars like Ander Herrera, Nemanja Matic, Jesse Lingard and Anthony Martial have not made an appearance for the side since the game against Liverpool.
Frontman Sanchez suffered knee ligament damage in Saturday's 3-2 home win over Southampton and is facing several weeks out.
Free-kick expert Ward-Prowse hit an outstanding strike to beat De Gea from distance and send the Saints fans wild.
Marcus Rashford and Romelu Lukaku could be the only senior players in an otherwise inexperienced front six but Young has backed the fringe players to step up.More news: Fortnite Visit Giant Face in Desert, Jungle & Snow Weekly Challenge
Alexis Sanchez picked up the knock during Man United 3-2 win over Southampton this past weekend and the manager has put question marks over his participation this week. "I've been part of that so many times myself", the caretaker boss said.
Lukaku then grabbed the vital victor with just two minutes, before the late drama ensued.
Angus Gunn saved Pogba's penalty, the France worldwide failing to convert from 12 yards for the third time in the Premier League this season.
Under Solskjaer Manchester United have found it pretty easy to score goals and so will be confident they can find the net a few times even against PSG's superstars.
We spoke about it at half-time and said get the ball in the box and play more forward because the Stretford End will suck it in for you.More news: Giants' Mike Shula worked one-on-one with Dwayne Haskins at NFL Combine
At the time (of his appointment) Ed Woodward probably thought: "I'm going to get him as a stop-gap " and I was of the same thinking.
"I will not deny to you that some factors had an influence in that the last period was not a good one".
There were a lot of attractive goals, I think it was a hard day for the goalkeepers. "Not our best game but we have to be happy".
United head to north London on Sunday afternoon sitting just one point above fifth-placed Arsenal in the Premier League table so the match will go a long way to determining which club finishes in the top four this season.More news: Steelers' Brown: 'It's all about respect'