Germany's Angelique Kerber (C) celebrates with teammate Sabine Lisicki (L) after defeating Serbia's Bojana Jovanovski in the tennis FedCup World Group play-off Germany vs Serbia in Stuttgart,  southwestern Germany, on April 20, 2013. Kerber won 7-5,6-2.  AFP PHOTO / THOMAS KIENZLE        (Photo credit should read THOMAS KIENZLE/AFP/Getty Images)