By Michael Gleeson
Coco Vandeweghe shrugged.
Meh, what's the big deal?
The unseeded American who didn't win a match here last year had just sent women's world number one and defending Australian Open title holder Angelique Kerber the way of men's world number one Andy Murray and out of the Australian Open.
That was the big deal.
Coco Vandeweghe celebrates after knocking out Angelique Kerber.Credit: Clive Brunskill/Gety Images
That was what had the stunned late night crowd cheering as she turned to her box and shrugged when the defending champion's return of serve on match point flew like a child's miss-hit high and long.
For the first time ever neither of the men's or women's top ranked players has made the quarter finals.
Only hours before Kerber, Sir Andy was beaten in four sets by 50th-ranked Mischa Zverev.
It was the first Grand Slam tournament for Kerber since taking over the No. 1 ranking from Serena Williams (whom she beat to win the Australian Open last year) after the US Open.
Angelique Kerber walks off court on Sunday night.Credit: Clive Brunskill/Getty Images
"It's really special to play a number one player in the world on any stage and in any round. I believe this is my first number one win so I will take that." said Vandeweghe, he world number 35.
Remarkably Kerber was the player who looked bereft of answers and Vandeweghe the authoritative player right from the outset with her heavy hitting power game that bullied the top seed on serve.
"I guess I faked it a lot because I was feeling crap out there but 'fake until you make it' I guess," she said courtside.
"When you play tough players you can't be showing you are struggling or not feeling confident in yourself. Last year I cam here and didn't even win a match and not here I am."
Kerber won in Melbourne last year then followed it winning the US Open and ending the year world number one. Those victories seemed distant memories as she lost 6-2 6-3 to the 25-year-old american.
Vandeweghe now faces Spain's French Open champion Garbine Muguruza.