Woa.... that's great with what you present. But how do you prevent a user from creating multiple accounts? Can you explain it to me?
OK, when we talk about football:
All players in the youth academy have to be registered with FIFA, so you can easily monitor who is who.
Nonetheless, we will create player passport in the system that will verify player and keep the record of the trainings, injuries etc - all on blockchain /// that will be also a very solid database of players history and protection mode.