Carrick: Man Utd senior players trust Januzaj
The 32-year-old Reds midfielder has no doubts he has the ability and grounding to hit the heights.
"You don't want to heap too much praise on him and put pressure on him because he is so young," Carrick told the Manchester Evening News.
"He will probably have good days and he will have not so good days because he is learning the game. But at Sunderland he was top drawer. He carried on what he has been doing in training since we got back from pre-season.
"I do talk to them on the pitch but you have to trust each other. He is good enough. He may be aged 18 but he's not a kid as a player. He is a top player. He is in the team so he is one of us. It doesn't really matter how old you are or how many games you have played.
"The boss picked him so we trust him. There are bits of advice and bits of help that people like myself can pass on. I told him at half time at Sunderland to get in the box a bit more - so that helped, didn't it!
"In terms of debuts, he has scored two and we have won 2-1 so what can you say about that?
"In some ways he won us the game. His performance was good. He has everything sat there for him to prosper and fulfil his potential.
"He is at the right club. He has the right players around him who are willing to help him and obviously the right manager. He has the ability. As long as he keeps along the right lines and does the right things he has got a great chance of having one of the best careers."
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