Jose Mourinho was taken aback by the "phenomenal" Henrikh Mkhitaryan goal that capped Manchester United's comprehensive win and ensured a chastening Old Trafford return for Sunderland manager David Moyes.
Initial struggles to break into the squad, never mind the line-up, have become a thing of the past for the talented Armenian, who has rapidly become a fans' favourite.
Mkhitaryan netted in a third successive match on Boxing Day and few can have opened their United account with three better goals after he followed up his excellent solo goal at Zorya Luhansk and drive against Tottenham.
Back from an ankle complaint, the 27-year-old substitute met a cross from Zlatan Ibrahimovic with an outrageous flick towards the end of the 3-1 win against Sunderland.
"I have to watch back on TV because I didn't yet, but it looked for me phenomenal," Mourinho said of the beautiful, if in fact offside, goal.
"I think he scored in the right goal, the Stretford End, with the people very enthusiastic just behind.
"It was a great moment and for him important because he was going up and up and then the injury comes.
"He was out of two matches and he's back. And to be back not just (with) the goal, I think he also brought quality with his performance. I am obviously happy."