Joined by their team captain Bogdan Obradovic, left, Serbia's Novak Djokovic, middle, and teammate Viktor Troicki joke around at a Tuesday, April 2, 2013, Davis Cup tennis news conferen

 

              Joined by their team captain Bogdan Obradovic, left, Serbia
Joined by their team captain Bogdan Obradovic, left, Serbia's Novak Djokovic, middle, and teammate Viktor Troicki joke around at a Tuesday, April 2, 2013, Davis Cup tennis news conference in Boise, Idaho. Serbia faces the United States in a Davis Cup match. (AP Photo/Idaho Press-Tribune, Greg Kreller)