World No 2 Djokovic needed just 73 minutes to finish off an embarrassingly one-sided 6-1, 6-0, 6-1 mauling of hapless Italian Paolo Lorenzi.

The second-seeded Serb overcame dropping his serve in the opening game to reel off 18 of the next 19 games, firing seven aces as well as 32 winners against 30-year-old Lorenzi, who has never won a Grand Slam match.