Djokovic winning and singing
![Djokovic winning and singing](../../attachement/jpg/site1/20120830/00221917e13e11a8fa3c27.jpg)
Novak Djokovic of Serbia celebrates after defeating Paolo Lorenzi of Italy 6-1, 6-0, 6-1 during their first-round match at the US Open on Tuesday. Cameron Spencer / Agence France-Presse |
Serb joins Call Me Maybe chorus and cruises into second round of US Open
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