The 22-year-old scored an impressive equaliser at Sunderland on Sunday.
Mancini said: “Adam is a good player, but is a young player.
“I think that in the future, he will be a good player for the national team, but now I don’t know.
“Maybe, but I don’t know, I don’t decide. I think the England national team has a good manager and he knows very well Adam Johnson and he will decide.”
