Tennis Circuit Training

What are my chances at a professional tennis player?
I am 15 and absolutely love tennis. I've been playing, I 13 was, and I've played numerous tournaments on the track Junior Masters in Brisbane Australia and I've never lost a game. My coach says I have a tremendous amount of natural talent and said I could start to play in the ITF in about 12 months if I train hard. I play tennis 4 days a week for 4 hours every day and practice again on my fitness. Most People say that I started too old, but I'm undefeated and have 4 trophies and 15 medalians and numerous certificates. I'm considering quiting school at the end of grade 11 to my To realize tennis dream. What are my chances of pro?
Sounds like you are one of the rare few who really have a chance. Work hard and follow your dream if its what you want to do. Remember, though, in tennis only about the top-50-100 make a decent life, so have a backup plan.