In this Dec. 27, 2012, photo visitor Savo Duvnjak smashes furniture and other household items during a demolishing session at the Rage Room, in Novi Sad, Serbia. (AP Photo/Darko Vojinovic)
Serbia's Novak Djokovic makes a forehand return to Ryan Harrison of the US during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 16, 2013. (AP Photo/Rob Griffith)
Serbia's Novak Djokovic hits a forehand return to France's Paul-Henri Mathieu during their first round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 14, 2013. (AP Photo/Andrew Brownbill)
Serbia's Novak Djokovic and Serena Williams of the US perform the gangnam style dance during the Kids Tennis Day at Melbourne Park ahead of the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 12, 2013. (AP Photo/Andy Wong)
associated press
U.S. Secretary of State Hillary Rodham Clinton leaves St. Nicholas Orthodox Church in Pristina, Kosovo, after meeting Wednesday with ethnic Serbs, who want independence or incorporation into an expanded Serbia. The U.S. and EU say that is not possible.
Novak Djokovic of Serbia kisses the trophy after winning the men's singles final match against Andy Murray of Britain at the Shanghai Masters tennis tournament at Qizhong Forest Sports City Tennis Center in Shanghai, China, Sunday Oct. 14, 2012. (AP Photo/Kin Cheung)
Britain's Andy Murray reacts after beating Serbia's Novak Djokovic in the championship match at the 2012 US Open tennis tournament, Monday, Sept. 10, 2012, in New York. (AP Photo/Darron Cummings)
Serbia's Novak Djokovic hits balls into the stands after beating Spain's David Ferrer in a semifinal match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)
Novak Djokovic of Serbia reacts while playing Spain's David Ferrer during a semifinal match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)