This ten-day tennis tourney at Crandon Tennis Center on Key Biscayne has become the fifth biggest in the world, behind only the four competitions that form the Grand Slam. Last year's singles winners were Andre Agassi and, in a thriller against hometown favorite Jennifer Capriati, Serena Williams, who notched her second consecutive Nasdaq win at the 2003 event (followed by her third at the '04 event). In addition to the finest pro tennis this side of Wimbledon, the event includes a blimp, exhibitions, food courts, and many other diversions. That it pumps millions of dollars into the local economy doesn't hurt.