Birmingham City coach James Beattie has urged Jude Bellingham not to leave if he doesn't want to.
Manchester United gave Bellingham a tour of their club facilities earlier in the year while both Chelsea and Borussia Dortmund are also interested in striking a deal.
"Jude's a very good player. He's a very nice young man as well, which is very important," Beattie told Sky Sports News.
"He's a good person - but potential is a dangerous word.
"I think if Jude keeps his feet on the ground and keeps developing, then he'll be a very, very good player.
"I just think there's a lot of pressure on him at the moment. He handles it very well and I just think he needs the right sort of people around him giving him the right sort of advice.
"Like I say, if he keeps his feet on the ground and his head strong, which he's more than capable of doing."
He added: "Jude's best advice is to just concentrate on his football, let that do the talking, and then when it comes to the decision, makes sure it's a decision that he's happy with, and that he's not making the decision on behalf of somebody else."