"I had some tough moments in that one," Murray said.

"I was down a break in the first two sets. It was a pretty long one in tough conditions."

Britain' s celebrations of a fine day three continued with Murray's compatriot Dan Evans defeating Croatian seventh seed Marin Cilic 3-6, 7-5, 6-3, 6-3.

"I think I played as well as I can play today, I was really pleased with how I played especially towards the end of the match," Evans said, admitting he's searching for a clothing sponsor after coming off contract with Nike in December following reporters questioning his non-colour coordinated attire.

"No (offers coming in), not at the minute anyway. We'll see. Another win, I might get one."

Women's top seed Angelique Kerber has also progressed, though with a little more court time under her belt, defeating German compatriot Carina Witthoeft with a scrappy 6-2, 6-7(3), 6-2 in a little over two hours.

"I was doing a lot of mistakes in the important moments," Kerber told reporters.

"But at the end, I'm happy that I won the match.

"It was not so easy, the conditions were also a little bit difficult today."

The third night was also difficult for Aussie Nick Kyrgios whose inner demons resurfaced, reigniting debate over the team supporting Australia's best hope for a home grand slam win.

It was a "banged up body" and a lack of preparation and the "poor management" of his "team" during the offseason that led to the 6-1, 7-6 (1), 6-4, 6-2, 8-10 loss, Kyrgios told reporters post match, though it's the mental side of the game that's letting him down.

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