Ole Gunnar Solskjaer claims he was unfazed to find his side 2-0 down to Southampton at half-time, as it is in Manchester United's DNA to "never give in".
The Red Devils went into the interval with a two-goal deficit after Jan Bednarek headed in from a corner and James Ward-Prowse doubled the Saints' advantage with a sublime free kick.
United were further rocked as goalkeeper David de Gea was forced off after suffering a knee injury as he attempted to save the free kick.
But the visitors rallied in the second half through Bruno Fernandes' strike and Edinson Cavani's double to come away from St Mary's with three points.
Solskjaer insists a positive result was never in doubt despite things looking bleak for United at the interval.
"I was quite calm [at half-time]," he told BBC Sport . "It's about not conceding another goal and getting the next one.
"There was always going to be another one in that game. We must have had five or six clear-cut chances in the game today so it was about taking them when we got the chance. It worked."
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The Red Devils boss added: "It is a trait of Manchester United to never give in. Every single one of them, there was absolutely no chance they were going to give up. That's a big thing for a Manchester United player and person."
Both goals United conceded came from set pieces, as Ward-Prowse whipped in the corner for Bednarek before burying his free kick 10 minutes later.
Solskjaer claims the two goals were due to Ward-Prowse's quality in dead-ball situations rather than defensive deficiencies in his side.
He said: "How can you be disappointed when you have the quality of James Ward-Prowse? You can't stop them. You cant blame anyone but just applaud what he is doing."
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