Jack Lester believes there are potentially 'several stars' in Nottingham Forest's title-winning Under 18s side.
And the former Forest striker believes a number of his current crop could go on to have excellent careers in the game.
Lester told Forest Player HD: "We believe there may be several stars. We do work closely with them, so I understand we have an affinity with the players, but some of the things they do don't half excite us. Their effort to want to be better, the way they dismantle teams and how they keep going is brilliant.
"We've done everything we can to take them out of their comfort zones - jogging up hills first thing in the morning, sending them up mountains. Whatever it is they just keep batting it back.
"I think they've enjoyed growing as men."
The season is far from over for the Under 18s, who have the end-of-season play-offs to look forward to as well as four more league games.
They are next in action on Saturday, when they take on Sheffield Wednesday at the Nigel Doughty Academy (kick-off 11am), and assistant Under 18s coach Gareth Holmes hopes fans will come down to congratulate the champions.
He said: "It'd be great. I'd like to thank all the fans who came to the Youth Cup matches, it was a real privilege for the boys, and if the fans can come down on Saturday the players would really appreciate that.
"We've got four games left of the league season and then we'll be in the play-offs. We want to be as successful as we possibly can."