Serena Williams is expected to fill in for an injured Justine Henin and play against Kim Clijsters in an exhibition match at a 40,000-seat stadium in Brussels next week. Organizers have been hoping to break the record for highest attendance at a tennis match -- the 30,492 at the 1973 "Battle of the Sexes" between Billie Jean King and Bobby Riggs at the Houston Astrodome. More...