The Belgian caught the attention of Berg last season.
"The No10, Adnan Januzaj, stands out with his skills, eye for a pass and his twists and turns but there are a few more good players in that side. I think Jesse Lingard has got great potential. When he puts on a bit more weight and gets a bit stronger, he looks like a player who can do something," he told manutd.com.
"There are a lot of good talents and it's nice to see them winning and coming back from 2-0 down. There is something about the mentality of this club and it's good to see that it's also there with the younger players as well."