Borussia Dortmund sporting director Michael Zorc has said Jadon Sancho is "one of the biggest talents of his age group in England."
Sancho, 17, joined Dortmund from Manchester City for a reported €7 million on the final day of the summer transfer window.
He has already played in two matches for the club's reserves, and Dortmund officials have high hopes for the attacking midfielder.
"Sancho is a huge talent. He's one of the biggest talents of his age group in England," Zorc said on BVB's TV channel.
"We don't only talk about developing talents, we give them playing time at a high level."
For the first couple of weeks after his move, Sancho had not been an option for the first-team squad.
FIFA's Player Status Committee had to validate the deal as clubs signing minors need to fulfil certain standards, but Zorc said: "We'll receive the playing licence now.
"He'll need some time to settle in. He's only 17, after all. But I am convinced we'll have a lot of fun with him in the next few years."
The BVB chief, in his 20th year in the role, said the club had "established ourselves as signing players who have not peaked yet."
He added: "This allows us to develop them here, and that sometimes makes it easier to get a player, especially young players.
"They know they will get match practice at a high level. That might be the difference to Bayern Munich, the clubs from Manchester, Chelsea, those big Spanish clubs."