Zaha could make his England debut in tonight's friendly.
Hamren said: "Wilfried Zaha? I know Saha, but I don't know if it's the right one.
"No, I don't know about him. Sometimes you get carried away. Sometimes. But that's also something that, in sport, we need those heroes or those stars.
"Sometimes, you make a star too early. It's better to make him a star when he is a star in world football. I hope he's not a star tomorrow but in the future.
"We have a lot of 'new Zlatans' here in Sweden. Maybe it's the new Zlatan. Maybe. But, so far, we only have one Zlatan."