Hingis exhibition tour = easy $$
I wonder if it has occured to Hingis that she could play 10 or 15 exhibitions a year against the likes of Seles, Kournikova, Martina N, McEnroe, the Jenson brothers and even her former nemeses the Williams sisters, and probably make a million bucks a year. She wouldn't have to train or worry about losing to any pesky lower-ranked players. It's not something that I personally would shell out 40 or 50 dollars to watch, but there are clearly plenty of people among Martina H's legion of hungry fans who would. All Hingis has to do is give the word and the agents will get right to work on it.