Australian Open: Vandeweghe ends Bouchard dream

The 35th-ranked American beat the unseeded Bouchard, battling back after her high-flying career plunged into a tailspin, 6-4, 3-6, 7-5 in the third round.

Coco Vadeweghe Australian Open

Coco Vandeweghe hits a return against Canada's Eugenie Bouchard during their women's singles third round match.   -  AFP

Volatile Coco Vandeweghe extended Eugenie Bouchard's Grand Slam misery on Friday when she ousted the Canadian comeback queen in a three-set epic at the Australian Open.

The 35th-ranked American beat the unseeded Bouchard, battling back after her high-flying career plunged into a tailspin, 6-4, 3-6, 7-5 in the third round.

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She will next face World No. 1 Angelique Kerber for a place on the quarterfinals.

The American right-hander has a reputation for being hot-tempered and there was always the chance of fireworks.

She threw a temper tantrum in her second-round clash against Pauline Parmentier, slamming her racquet into the ground three times when she gave away a break point.

It was the second time in as many weeks that her frustrations had boiled over, pulling a similar stunt at this month's Sydney International. But despite her fiercely competitive nature, she largely kept her emotions in check against the Canadian, only throwing down her racquet once, but not smashing it.

Classy Venus ends Chinese Open hopes

Venus Williams ended Chinese hopes at the Australian Open on Friday, swatting aside Duan Yingying to make the fourth round of the season's opening Grand Slam for a 10th time.

The 13th seed was in a different league, spanking Duan 6-1, 6-0 on Margaret Court Arena and showing no signs of the elbow injury that forced her out of the doubles with sister Serena.

She will next play either Australian hope Ashleigh Barty, who has returned to tennis after a temporary career switch to cricket, or German qualifier Mona Barthel. If she comes through that encounter, a potential quarterfinal with fellow old-timer Svetlana Kuznetsova could await her.