Qualifying begins: 20 June
The Draw: 24 June
Pre-event Press Conferences: 25 & 26 June
Order of Play: 26 June
Championships begin: 27 June
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After men’s world No.1 Andy Murray was stunned in four sets by the unheralded German, Mischa Zverev, Federer outlasted fifth seed Kei Nishikori in a topsy-turvy five-setter. He’ll play Zverev for a place in the semi-finals.
But it was the exit of Kerber, brought about by the monstrous hitting from the American Vandeweghe, that stole the headlines. Vandeweghe battered 30 winners past a bewildered Kerber, who never stood a chance.
The defending champion tried everything she could to cope with an inspired opponent but world No.35 Vandeweghe didn’t blink as she claimed a 6-2, 6-3 win that made more history – it's the first time the two No.1s had both failed to make it to the quarter-finals of the Australian Open.
“It’s really special, to play the No.1 in the world, I believe it’s my first No.1 win,” Vandeweghe said. “I’ll take that.”
“Of course I'm disappointed,” Kerber said. “But I was not feeling the ball at all tonight. I was not playing good from the first point. It was not my day and not my match, for sure."
Federer wasn’t exactly second-fiddle, though, as he continued his remarkable comeback by edging out Nishikori 6-7, 6-4, 6-1, 4-6, 6-3, his performance testament to his remarkable fitness after so much time off the Tour.
The No.17 seed reeled off 83 winners, and looks just as potent as he did in 2015, when he reached two Grand Slam finals.
Federer, who won the last of his 17 Grand Slam titles five years ago at Wimbledon, ran away with the fifth set and the way he jumped and roared after converting his first match showed what it meant to him, and will perhaps give him renewed belief that he can go all the way.
“I think I'm playing better and better,” he said. “I served exceptionally well tonight, which was key. I'm very pleased there. Rhythm from the baseline is there now. I'm in the tournament now and you know how the balls and the court surface reacts to my shots and for my opponents what can happen.
"I'm not getting surprised so much anymore, which is only helpful for the next round.
Power men to battle
Stan Wawrinka and Jo-Wilfried Tsonga, two of the strongest men on the Tour, will battle it out in the quarter-finals after both came through tough clashes. Fourth seed Wawrinka edged past Italy’s Andreas Seppi 7-6, 7-6, 7-6 while Tsonga outmuscled Britain’s last man standing, Dan Evans, wearing him down physically in a 6-7, 6-2, 6-4, 6-4 win.
Under the radar
Nobody, but nobody has been talking about Garbine Muguruza, which is a bit rude since she is the reigning French Open champion. The Spaniard has improved round on round and her 6-2, 6-3 win over Sorana Cirstea means she’ll get a crack at Vandeweghe.
Quote of the night
“Fake it to make it” – Coco Vandeweghe explains how she kept her nerves under wraps
Shot of the night
Has to be Federer, who came up with something a little bit special to bend this one round the net for a winner against Nishikori...