Celtic boss Ronny Deila will gradually introduce Patrick Roberts.
The Manchester City winger has joined Celtic on an 18 month loan.
Deila believes the player needs time to adapt before he can play in the senior team.
"This is 18 months and he needs time to adapt to how we train and play," said Deila . "He also had some injuries before he arrived, so he still needs to get better fitness-wise.
"We've spoken with him a lot and he has skills, which means he can do something at this level."
"He was up and down in the Under-20 game, but there were times he was at a fantastic level. He scored a very good goal and has touch and vision. We have to use this first half of the year to get him adapted, but I'm not saying he can't be involved. Hopefully he can kick on as quickly as possible," he added.