Re: Prize money for juniors?
1) Junior events don't pay prize monies.
2) They don't care if you're pro or amateur.
3) Junior players can play in non-paying Junior events or in any money-making events (if they qualify)
4) Once engaged in money-making (prize money or $$$ sponsorships, nobody cares about secret moonlighting) activities, the player loses amateur status. Won't be eligible to play in most amateur competitions including NCAA (thus can't get sports scholarship or have to wait for a few years.)
Ciarán: That's why supports from national tennis federations are quite important.