ESPN looks at the 25 most expensive under-21 signings made from 1999 to 2022 to determine whether those players met or broke their ceiling, or failed to live up to the hype.
Saudi Pro League side Al-Ittihad have completed a £25m deal for Jota from Celtic; Portuguese winger leaves Scottish Premiership champions after two seasons at the club; the 24-year-old scored 15 goals and provided 12 assists last season as the Hoops won the domestic treble
