In six games at the helm, Michael Carrick has made two changes to his starting line-up, both due to injury.
Lisandro Martinez missed this one because of a minor calf problem, which meant Leny Yoro had to step in at the back.
He is backing his players, and he knows there is firepower on the bench too.
When Manchester United performed as poorly as they had done at West Ham, some critics were already taking to social media to claim the bubble had burst.
However, Carrick has trust in Bejmain Sesko. With less than an hour gone and with little sign of a goal coming, Carrick sent on his towering forward.
His finish was not as eye-catching as the one at London Stadium, but he held his nerve when it mattered.
Sesko should have had a second after he was sent clear by Diogo Dalot as the game entered stoppage time.
If he had taken it, it would have spared United a few anxious minutes. As it was, he failed to control the ball properly, and England goalkeeper Jordan Pickford was able to see off the danger.
Sesko's goals in the past two games could prove priceless in the battle for one of what seem certain to be one of five Champions League places.
Not only have United put three points between them and Chelsea and Liverpool, who sit fifth and sixth, but they are now only three points behind third-placed Aston Villa, who they entertain at Old Trafford in three games' time.