Murray, faced with the world record-breaking serve of the physically imposing Sam Groth, had all the answers as he won 6-0, 6-4, 6-1 in just 91 minutes against the flummoxed Australian.
    
Earlier, Ivanovic went through 6-3, 6-3 against Anastasija Sevastova in a match which was held up for 30 minutes when a fan was badly injured by a fall on some steps inside Rod Laver Arena.

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"I felt really bad. I was really shaking, because the sound of the lady falling was really loud. I could hear it," said Ivanovic, who looked on anxiously as the patron received treatment.
    
Two-time champion Victoria Azarenka was the most impressive of the women's winners when she hammered Danka Kovinic 6-1, 6-2 to reach the third round for the loss of just three games in total.

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"I think I'm feeling in the best shape body-wise, spirit-wise, everything-wise," said Azarenka, who has recovered from injury and a bout of depression following her split with musician Redfoo.

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