The Explainer gave a good (brief) overview of the cash involved in pro-tennis. During Andy Roddick's match against Marc Gicquel at the U.S. Open Thursday night, commentator John McEnroe quipped on ESPN that Gicquel, now ranked No. 81, might have to start looking for another job. How good does a tennis player have to be to make a living? In the top 200 or so, depending on what you consider a comfortable wage. Say we draw the line at $100,000 a year—before expenses (more on that below). In 2008, slightly more than 200 men made at least $100,000 in prize money. For women, the numbers were slightly lower: In 2008, 143 women players made at least $100,000 or more in prize money, while 200 of them made at least $50,000 in prize money. Full article here.