The holders secured a place in the Fourth Round with a 3-0 triumph at Old Trafford, courtesy of goals from Alejandro Garnacho, Casemiro and Anthony Martial.
Mason Mount impressed in his first outing since the defeat at Tottenham, our second fixture of the season, but was withdrawn at the interval.
However, Ten Hag allayed any fears that the England international had suffered a recurrence of his injury.
"I think it was probably two assists [for Mount] because it was [almost] a pre-assist for the first goal," the boss told MUTV's Stewart Gardner afterwards. "That was also the foundation for that goal.