Kylian Mbappe's future has been the most talked about transfer of the summer but it appears his true value is second to one of England's current finest young talents.
Tottenham midfielder Dele Alli has been identified as the world's most valuable player aged 21 or under with Mbappe second.
Alli is valued at £73.6million by a Soccerex 20 Under-21 report, which uses Prime Time Sport's Football Value Index, to rank footballers born on or after January 1, 1996.
This is £18.