Think the answer lies in this bit
You are always going to get drop-outs, and now I know you have to create an environment where it's cool to be at a tennis club, where it's enjoyable to be at a tennis club.
"It can be a very lonely sport, and academies like those in Florida are much better. The kids are all training together under one roof, and it is a social environment. We have to try and do that in Scotland."
Injuries have hampered Martin Lee, while the amount of hard work needed to succeed proved a step too far for Bogdanovich and Lee Childs.
It's a precarious sport, isn't it? :?