Ole Gunnar Solskjaer was pleased by his players' ruthlessness and insisted they "played the game properly" as Manchester United sent nine-man Southampton home stinging from a 9-0 loss.
A night that began with Alexandre Jankewitz being sent off within 90 seconds of his first Saints start ended with the Old Trafford giants equalling their Premier League record win against Ipswich in 1995.
Aaron Wan-Bissaka and Marcus Rashford got the ball rolling, with Jan Bednarek scoring an own goal before Edinson Cavani grabbed a fourth in a one-sided first half.
"But in the end it's a little bit different situation to the first time because we've played a good season so far and we are in a position in the table where we haven't been for a long time."
Hasenhuttl says teenager Jankewitz "knows he made a big mistake" after the gutting defeat.
"We don't need this result to know what we have to do better," the Southampton boss added.
"This time it's a completely different situation, not that it hurts less. The opposite. It hurts even more when you get this result again.
"But, I mean, the team is a different one now and it's the reason why we've played a good season so far, so let's see how the season ends. Better than the past, I think."
