Berdych, Andy Murray, Juan Martin Del Potro separated by just 20 points
Event will feature 15-20 celebrity athletes, 150 sports industry executives, 40+ sponsor companies.
Serena Williams, American legends Pete Sampras, Andre Agassi also selected
Ivan Lendl turns 54
American legend says family comes first
Atlanta a perfect fit for global tennis and squash brand.
Young stars play tennis on floating court.
