Matej Kovar, Teden Mengi, Hannibal, Anthony Elanga and Mason Greenwood are the youngsters included, along with the main 25-man squad.
Players on the B-list must be born on or after 1 January 2000 and have been eligible to play for the club for any interrupted period of two years since his 15th birthday (by the time he is registered by UEFA), or three consecutive years with a maximum of one loan period to a club from the same association for a period not longer than one year.
Hence, Mason, despite being a first-team regular for some time, still qualifies in this regard.