Argentine tennis player Juan Martin Del Potro (R) greets a boy with Down syndrome at the end of the game during which Argentine Juan Chela and teammate Ernesto Schwank defeated Kazakhstan's Yuriy Schukin and Evgeny Korolev in their Davis Cup quarterfinals doubles game at Parque Roca stadium in Buenos Aires on July 8, 2011. Chela and Schwank won 6-3, 6-2 and 7-5 and Argentina leads the series by 3-0 and will play the semifinals.    AFP PHOTO/DANIEL GARCIA (Photo credit should read DANIEL GARCIA/AFP/Getty Images)