Record-chasing Rafael Nadal cruised through to the third round of the Australian Open after outclassing Michael Mmoh in straight sets.

Nadal is bidding to move clear of Roger Federer with a record 21st grand slam title, while the world number two is also looking to become the first man in the Open Era to win each of the four majors twice.

The 2009 Australian Open champion remains on track thanks to Thursday's 6-1 6-4 6-2 victory in warm conditions under the Rod Laver Arena lights.

Nadal was aiming to maintain his perfect record against qualifiers at the Australian Open - the Spanish star having won 25 of the 26 matches played against qualifiers at a grand slam, with his only defeat coming to Dustin Brown at Wimbledon in 2015.

He did not have much trouble against Mmoh, Nadal schooling the 23-year-old in a merciless and devastating first set, which saw him win 80 per cent of first serves, hit 10 winners and break twice.

Mmoh, who was looking to surpass the achievement of his father after Tony reached the Australian Open second round in 1988, provided some flashes of quality.

On just one occasion had Nadal lost to a player as low as number 177 Mmoh at ATP Tour-level - world number 690 Joachim Johansson in 2006, while Nick Kyrgios (144) was the lowest-ranked player to upstage the veteran at a slam via Wimbledon in 2014.

But it was trademark Nadal, who despite Mmoh's best efforts, broke in the fifth game for a 3-2 lead and never looked back, though one unruly fan tried their best to derail the former world number one before being escorted out of the stadium.

Amid concerns over his back pre-tournament, Nadal raced through the third set with a couple of highlight shots to set up a clash against Cameron Norrie.

Data Slam: Nadal stays perfect

Nadal improved to 50-0 when winning the opening two sets at the Australian Open, dating back to 2004.

WINNERS/UNFORCED ERRORS
Nadal – 40/24
Mmoh – 16/25

ACES/DOUBLE FAULTS
Nadal – 7/3
Mmoh – 8/4

BREAK POINTS WON
Nadal – 5/11
Mmoh – 0/0