Paul Pogba was not ready to face Burnley, Manchester United manager Ole Gunnar Solskjaer revealed after the Frenchman missed the 2-0 victory at Turf Moor.
Pogba returned from nearly three months out with an ankle injury as a substitute against Watford last weekend and played the second half of Thursday's victory over Newcastle.
With Scott McTominay injured, Pogba had been tipped for a start against Burnley but did not make the short trip to Lancashire.
Burnley boss Sean Dyche was disappointed that it was another error from his team that allowed United to make the breakthrough.
He said: "Two back-to-back games that have been frustrating really because two mistakes at key times have affected the outcome.
"But a lot of good things from the performance. (We were) still playing a top side. Generally first half we handled it well and then a mistake changes the feel. I thought second half we responded to that really well. I was really pleased with the second-half performance."