1. He started at age 12
2. Never had private lessons
3. Played on a HS tennis team where the basketball coach was also the tennis coach.
Do you think he still could have made it to the Top 10?
Well, at age 12 that would make 44% efficiency because of age factor.
Also he loses in other factors, like default surplus value. The ability of his surroundings did affect his relative values added by 2. That is due to additional factors in the 66,4% formula used. Those numbers are divided by 72 of course, which is minus 14 and 15, but we have to add another 22,54% because of correlation not proven by the formula. We interlink those numbers across three different equations.
According to my calculations, he would have exactly 1,6 majors by now.
I hope I cleared some stuff for you.