Check out the list of most valuable U21 players in the world. Mbappe, currently the most valuable player, leads the list with a market value of €180m.
Jadon Sancho and Alexander-Arnold follow with €117m and €99m.
There are three Dortmund players and three Real Madrid players in the top 20.
Who do you think doesn't deserve his market value and who else should be included in the list?