United were subjected to a humiliating 3-1 defeat at home to local rivals City in the first leg of their semi on Tuesday.
“You're disappointed when you lose a game against local rivals, but which way is there to go?" said Solskjaer.
“Do you feel sorry for yourself or knuckle down and get ready for the next one?
“One of the worst traits a footballer can have is feeling sorry for yourself. If you do that, you're not in the right place.
“The boys are focused, it was a disappointing feeling, it was the game we didn't want to lose and I'm sure we'll get a reaction."