The former Blackburn Rovers manager has taken time to watch the Under-21s in action and liked what he saw of Joyce's side, particularly at the tail-end of the successful campaign.
"I think the last two games, in particular, were excellent," continued Berg. "It was a great result against Liverpool, even though beating Tottenham in the final was also very, very good. They could have done a lot better in the first half against Spurs but they played how they can do in the second half. There are some very talented players in that team.
"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.
"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."