Johanna Konta boosted British hopes at the Australian Open with a titanic three-set win over home player Ajla Tomljanovic in Melbourne.

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The British number one, 27, won a final-set tie-break to edge a finely balanced match.

She joins Katie Boulter and Dan Evans in round two after a 7-6 (7-4) 2-6 7-6 (10-7) win.

Konta will play two-time Grand Slam champion Garbine Muguruza next after the Spaniard beat Saisai Zheng 6-2 6-3.

Konta, who reached a career-high ranking of four in 2017, is left as the nation’s leading contender following exits for Andy Murray and Kyle Edmund on Monday.

Now ranked 38th in the world, she showed flashes of the form that helped her reach the 2016 semi-finals in Melbourne in a match that lasted two hours and 51 minutes.

“Overall, every aspect of the match was tough,” Konta said.

“I played a tough opponent who I lost to recently [in Brisbane] and the first round of Grand Slams are never easy. And the condition were tough, humid and hot.

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“But I competed hard and I’m happy I could compete on every single point.

“I’m happy to have stayed with her when she was playing well but also play tennis on my own terms.”

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