When, exactly, that will be is unclear, although manager Ole Gunnar Solskjaer has suggested that our new no.19 could appear for the first team within the next four to five weeks, depending on how quickly he adjusts to the physical demands of English football.
It's possible that Diallo will be blooded in the Under-23s prior to stepping up to the seniors, as has happened with summer arrival Facundo Pellistri.
However, Ole's comments are encouraging, and there's another positive sign, albeit one outside the boss's control.
On Friday, Amad was added to the Premier League's official fantasy football game, which is played by over one million fans worldwide.