So what's yours guys? You can pick any player on your team that is 23 years old or younger. This may be simply your opinion, and you can put all of Spur's youth team if that's your favorite U-23 starting 11. Here's some ideas guys.

GK
Thibaut Courtois (Atletico Madrid)
David de Gea (Manchester United)
Marc-Andre ter Stegen (Monchengladbach)

DF
Mattia De Sciglio (AC Milan)
Raphael Varane (Real Madrid)
Marting Montoya (Barcelona)
Marc Bartra (Barcelona)
Phil Jones (Manchester United)
Matija Nastasic (Manchester City)
Jordi Alba (Barcelona)
Rafael da Silva (Manchester United)

MD
Isco (Malaga)
Mario Gotze (Dortmund)
Ilkay Gundogan (Dortmund)
Oscar (Chelsea)
Thiago Alcantara (Barcelona)
Tom Cleverley (Manchester United)
Lucas Moura (PSG)
Toni Kroos (Bayern)

AT
Gerard Deulofeu (Barcelona B)
Neymar (Santos)
Eden Hazard (Chelsea)
Gareth Bale (Tottenham)
James Rodriguez (Porto)
Xherdan Shaqiri (Bayern)
Thomas Muller (Bayern)
Marco Reus (Dortmund)

You don't have to choose from this list (this is opinionated and this list was for ideas), so feel free to make the team of your choice!