Barcelona winger Lamine Yamal was the most valuable Under 21 player in world football during the 2025/26 season.
Yamal is amongst the contenders to win this year's Ballon d'Or award after helping Barcelona win the La Liga title, before becoming a World Cup winner with Spain.
The fleet-footed attacker currently has a market value of €220m according to Transfermarkt and is amongst the most valuable players of any age.
Paris Saint-Germain's Desire Doue is second on the list of the most valuable Under 21 players after playing a key role in back-to-back UEFA Champions League titles.
Yamal's Barcelona teammate and fellow World Cup winner Pau Cubarsi is third, while Arda Guler and Ousmane Dembele complete the top five.
Manchester United midfielder Kobbie Mainoo is the only English player in the top ten, with the likes of Estevao and Kenan Yildiz also featuring.