Not necessarily. Garnacho played a lot last season, had amassed almost 100 appearances for United before turning 20, and then went to Copa America in the summer. There's absolutely no problem with him starting the season as a rotational option, for now. Amad, on the other hand, is 22 and hasn't had nearly enough first team football in the last 12 months. He absolutely needs to play at this stage of his career, whilst Garnacho needs a bit of a rest. I'm scared that we will overplay both him and Mainoo.