number one on forbes' list of top paid female athletes for ten years in a row. what is the prize winnings for the champion of the u.s. open? >> is it $2 million? >> reporter: wow. you're short by a million. >> am i? >> reporter: it's $3 million. >> see, i don't even know. >> reporter: beautiful and strong bodies are essential. oh, this is where you look up the nutritional -- >> this is our nutrition kiosk, yes. >> reporter: some players eat 5,000 calories a day to stay fueled 37 for fans, their dining hall is gourmet, too. high-priced sitdown restaurants with menus by some of the country's top chefs are part of the draw. after all, the average salary of a tennis fan is $150,000. football fans, they bring home $56,000 less. is that why you're here, for the tennis? >> for the food mainly, but i heard they had tennis yesterday. >> reporter: for 125 you can pass the time between matches