Denmark's Caroline Wozniacki (L) shakes hands with Romania's Simona Halep after their semifinal at the WTA Tennis Grand Prix in Stuttgart, southwestern Germany, on April 25, 2015. Wozniacki won 7-5, 5-7, 6-2.  AFP PHOTO / THOMAS KIENZLE        (Photo credit should read THOMAS KIENZLE/AFP/Getty Images)