The young pair are regarded as senior leaders inside the locker room.
Carrick says, "We had stick at the start of 2007/08. We weren't playing well or scoring enough goals. We ended up with the Champions League and Premier League.
"You become totally oblivious to outside noise, that's the truth. The scrutiny and expectation is something you get used to. Everyone wants a piece of Manchester United, good or bad. You have to take it and when it's good, it's something special.
"Someone like Marcus has been at Manchester United since he was a kid. He knows the place inside-out, what is expected and acknowledges the responsibility. It is great to see.
"Scotty (Scott McTominay) has summed us up, how much he has come on and the importance he has."