24 January, 2017
The top seed of Australian Open Angelique Kerber suffered an upset defeat to world number 35 Coco Vandeweghe of United States of America (USA).
Kerber played well in the third round but the German needs to hit her peak - which she is yet to do - in order to dispatch one of the tournament's more risky unseeded players.
New Yorker Vandeweghe later hammered down 30 winners to Kerber's seven, overpowering the U.S. Open champion 6-2 6-3 to set up a meeting with Spanish seventh seed Garbine Muguruza in her first trip to the last eight in Melbourne.
This will be Vandeweghe's first quarter-final appearance at the Australian Open.
Responding to a suggestion that Kerber may have been nervous, Vandeweghe said: "I can't really speak for her emotions and feelings". "But, you know, fake it 'til you make it...my game plan was to execute knowing that she was going to get a lot of balls back..." Should Serena Williams, the highest-ranked female remaining, win the title she will overtake Kerber as World No. 1.
Vandeweghe's victory sees her enter a Grand Slam quarter-final for only the second time in her career.
"It's the first time I've ever beaten a world number one and especially at a grand slam, I think it makes it that much sweeter".
He was ecstatic. "It was about staying with him. nearly going down 6-0, I thought 'It's not going to get any worse from there, '" said Federer, on the comeback from six months on the sidelines to fix his injured left knee. "We're two totally opposite players".
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The seven-time major victor next plays No. 24-seeded Anastasia Pavlyuchenkova, who beat No. 8 Svetlana Kuznetsova 6-3, 6-3. "I think that was not my game I play normally".
"Last year I came here and I didn't even win a match and here I am now."She was up a break in the second set and looked to be regaining control of the match, but Vandeweghe came charging back with pinpoint forehand winners that Kerber just watched go by.
Muguruza beat Sorana Cirstea 6-2, 6-3 and will next play Vandeweghe - they're both in the quarterfinals here for the first time.
With Murray and the Serbian reigning champion having already departed, Melbourne Park will next week witness the first grand slam since the 2004 French Open without its top two men's seeds. "Whatever, you've still got to go out there and beat them". On her third break point opportunity Vandeweghe was able to convert and jumped ahead in the opening set.
Seven-time major victor Venus Williams returned to the quarter-finals for the ninth time with a 6-3, 7-5 win over No. 181-ranked Mona Barthel.
The sisters played each other for the first time in Melbourne in 1998, with Venus coming out on top of the second-round match on her way to the quarter-finals.
The victor of the top half of the draw will likely line up against either third seed Milos Raonic or eighth seed Dominic Thiem in the final - or Rafael Nadal if the two grand slam titans can each win two more matches.