Milos stuns Stan

Milos Raonic relies on a quiet head on his shoulders during times of trouble, as was the case when beating Stanislas Wawrinka in the Australian Open fourth round yesterday.

The Canadian 13th seed looked serene as he moved two sets ahead against the Swiss former champion but even when Stan Wawrinka roused himself to level the match, Milos Raonic called on his Zen-like inner peace and refused to panic.

Sitting tranquilly on his court-side chair staring into the middle distance, the 25-year-old re-focused on the task in hand and completed a 6-4 6-3 5-7 4-6 6-3 victory to book a quarter-final spot.

"I felt very clear in what I needed to do and I believed that I could do it," Raonic, who pounded down 24 aces and hit 82 clean winners, told reporters.

"The more I understand my game, what I need to do, the more I can keep a quiet head on my shoulders."

Later, second seed Andy Murray had his feathers ruffled but scrapped his way into the Australian Open quarter-finals with a 6-4 6-4 7-6(4) victory over local world number 17 Bernard Tomic.

Murray clinched the third set tiebreak when Tomic went long with a return after two and a half hours on Rod Laver Arena to set up a quarter-final meeting with Spanish eighth seed David Ferrer.

Johanna Konta mounted a stirring comeback to upset Ekaterina Makarova 4-6 6-4 8-6.

Konta was followed into the quarter-finals by men's world number two Andy Murray, to give Britain their first man and woman in the last eight at a grand slam in almost 40 years.

Although she wobbled while serving for the set at 5-4 in the decider, she made no mistake at the second opportunity after three hours, four minutes of graft in Margaret Court Arena and threw her arms skyward in jubilant relief.

"I really enjoyed the match for what it was," she said. "It was a very high-level match against a very, very good player.

Lastly, Victoria Azarenka was plagued by anxiety about her beloved Denver Broncos in the NFL playoffs but the Belarusian had few nervous moments in a 6-2 6-4 win over Barbora Strycova that put her into a fifth Australian Open quarter-final.

After wrapping up victory over the unseeded Czech, twice champion Azarenka wasted little time in finding out if her favourite team had booked their place in the Super Bowl.

"I played smart, I played aggressive and I took my opportunities. Can someone tell me if the Broncos won?" she asked the crowd at Rod Laver Arena during a courtside interview.

"Yes!" she screamed after being told the Broncos had won.