Nature-lover Novak Djokovic strolled into the third round of the Australian Open on Thursday as an erratic Madison Keys wobbled but did enough to keep her title defense on track.

Djokovic sent 141st-ranked qualifier Francesco Maestrelli packing in straight sets at Rod Laver Arena.

The Serbian, once again on a mission to win a record 25th Grand Slam title, dismissed the Italian 6-3, 6-2, 6-2.