The following piece of literature is from someone who did the sums on tennis, it's tough to read if you are looking to make the sport your career but here it is , word for word from 'tennis insiders.com;
'Right now there are about 14 US players on the ATP and WTA tours who are earning a net profit. They span about 17.5 years of playing on tour. That means that the US as a Country produces about 8 1/10's of one paying job per year as a pro tennis player. If you are pushing your child for that 8 1/10's of one job then you need to have your head examined. The pro tennis system is broken beyond belief. It is nothing short of a flat out Business catastrophe perpetrated against our sport .... but it is still our catastrophe. So unless you are going to start a new pro tour ..... you are looking at 80 percent of one paying job per year.
It cracks me up that the 100's of 1000's of dollars that people spend on their kid's tennis, berating them after their losses, devoting their entire family's live's to the cause ..... only to find out that the average professional tennis player loses money as opposed to makes it.'
Thought that was worth a repost, I put it on this site quite some time ago as I thought it had merit.