'Perfect' Novak sets sights on Golden Slam

'Stratospheric' Serb looking to make history

Novak Djokovic is hitting ever greater heights ahead of the Australian Open - posing problems for his rivals, and raising hopes of the first men's Golden Slam.

Picking up where he left off after a blistering 2015, Djokovic destroyed Rafael Nadal in last week's Qatar Open final, in a performance the Spaniard called "stratospheric".