In other men's matches, 5th seed Dominic Thiem scraped past Denis Kudla in a 5-set thriller.
Big names Juan Martin Del Potro, Tomas Berdych and Alexander Zverev all booked their way to the next stage in 4 sets and for the first time at the Australian Open, South Korean Hyeon Chung made it to the third round with his win over Daniil Medvedev.
However 7th seed David Goffin, was bundled out by Frenchman Julien Benneteau and 13th seed Sam Querrey was also upset by Marton Fucsovics.
Roger Federer on the other hand had no such problems with his German opponent, blasting his way to a straight-set victory over Jan-Lennard Struff.
In the women's bracket, top talent Madison Keys, Simona Halep, Karolina Pliskova and Angelique Kerber all advanced in straight sets, while Caroline Garcia managed to overcome Marketa Vondrousova in three.
Australia's 18th seed Ashleigh Barty also took 3 sets to get past Italian hitter Camila Giorgi, in a late night match that had local Aussie fans ecstatic.
But there was also plenty of upsets.
An unbelievable performance from Hsieh Su-Wei saw her defeat third seed Muguruza Garbine.
While American number 123 in the world Bernarda Pera, knocked out 9th seed Johanna Konta and 16th seed Elena Vesnina lost to in form Japanese player, Naomi Osaka.
Despite the heat, 63,000 fans attended the day's play at Melbourne Park.
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2020-09-15
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