Djokovic's first hat-trick at Australian Open

Novak Djokovic of Serbia hits a return to Andy Murray of Britain during their men's singles final match at the Australian Open tennis tournament in Melbourne, Jan 27, 2013. [Photo/Agencies]

Novak Djokovic of Serbia stretches during his men's singles final match against Andy Murray of Britain at the Australian Open tennis tournament in Melbourne, Jan 27, 2013. [Photo/Agencies]