Spain's Rafael Nadal returns the ball to Serbia's Novak Djokovic during their final match at the Italian Open tennis tournament, in Rome, Monday, May 21, 2012. (AP Photo/Riccardo De Luca)
A man passes by an election billboard in central Belgrade, Serbia, that depicts Ivica Dacic, the leader of the Socialist Party of Serbia, formed by late strongman Slobodan Milosevic, on May 5, 2012. (Associated Press)
John Isner, of the United States, returns a shot to Novak Djokovic, of Serbia, during a men's semifinal match at the BNP Paribas Open tennis tournament Saturday, March 17, 2012, in Indian Wells, Calif. (AP Photo/Darron Cummings)
Protesters stand March 6, 2012, on a crossed picture of Syrian President Bashar Assad during a rally against his regime in front of the Syrian embassy in Belgrade, Serbia. (Associated Press)
Protesters hold banners that read "Freedom Syria" and "Stop the: lies, stealing, murder" during a March 6, 2012, rally against Syrian President Bashar Assad regime in front of the Syrian embassy in Belgrade, Serbia. (Associated Press)
A woman passes by posters of Vojislav Seselj, the leader of the ultra-nationalist SRS-Serbian Radical Party, that read "Serbia doesn't want the EU — Serbia wants Seselj", in Belgrade, Serbia, on Feb. 28, 2012. European Union foreign ministers will decide Tuesday whether Serbia should become a candidate for membership in the bloc after it reached a key agreement with its former province of Kosovo. (Associated Press)
A sparse gathering watches Angelina Jolie's "In the Land of Blood and Honey" on Friday in a theater in Belgrade, Serbia. The film has triggered mixed emotions in the postwar Balkans, garnering standing ovations in Sarajevo, Bosnia, but sparking outrage among Serbs, who claim it depicts them as the only villains of the 1992-95 war. (Associated Press)
Novak Djokovic of Serbia kisses the trophy during the award ceremony after defeating Rafael Nadal of Spain in the men's singles final at the Australian Open tennis championship, in Melbourne, Australia, early Monday, Jan. 30, 2012. (AP Photo/Rick Rycroft)
Novak Djokovic of Serbia serves to Rafael Nadal of Spain during the men's singles final at the Australian Open tennis championship in Melbourne, Australia, on Sunday, Jan. 29, 2012. (AP Photo/John Donegan)
Novak Djokovic of Serbia celebrates after defeating Andy Murray of Britain during their semifinal at the Australian Open, in Melbourne, Australia, early Saturday, Jan. 28, 2012. (AP Photo/Andrew Brownbill)
Serbia's Novak Djokovic celebrates following his win over France's Nicholas Mahut in their third-round match at the Australian Open, in Melbourne, Australia, Saturday, Jan. 21, 2012. (AP Photo/John Donegan)
Serena Williams reacts during her match against Ana Ivanovic of Serbia during the U.S. Open tennis tournament in New York, Monday, Sept. 5, 2011. (AP Photo/Mel Evans)
In this photo provided by the Politika newspaper shows war crimes fugitive Goran Hadzic on Mount Fruska Gora, Serbia, Wednesday, July 20, 2011. (AP Photo/Politika newspaper, HO)
Serbia's Novak Djokovic dives for a return shot to Spain's Rafael Nadal during the men's singles final at the All England Lawn Tennis Championships at Wimbledon, England, on Sunday, July 3, 2011. (AP Photo/Kirsty Wigglesworth)
Switzerland's Roger Federer reacts as he plays Serbia's Novak Djokovic during their semi final match for the French Open tennis tournament at the Roland Garros stadium in Paris, Friday June 3, 2011. Federer won 7-6, 6-3, 3-6, 7-6.(AP Photo/Michel Euler)
This image taken from Associated Press Television News shows the aircraft believed to be carrying war crimes suspect Ratko Mladic as it lands at Rotterdam The Hague Airport in the Netherlands after a flight from Belgrade, Serbia, on Tuesday, May 31, 2011. (AP Photo/APTN)
A member of the Serb Gendarmerie guards the entrance of the Special Court in Belgrade, Serbia, on May 31, 2011. As he awaited extradition to a U.N. tribunal, jailed war crimes suspect Ratko Mladic was allowed to visit the grave of his daughter, who committed suicide during Bosnia's war. (Associated Press)