Kvitova, Pliskova in Brisbane tennis semis

Ed Jackson
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BRISBANE INTERNATIONAL DAY 5

Karolina Pliskova (pic) has reached the Brisbane International semi-finals by beating Alison Riske

Dual Wimbledon champion Petra Kvitova is closing in on a second Brisbane International crown after ending the giantkilling run of American qualifier Jennifer Brady.

Kvitova made light work of the 24-year-old Brady, who had eliminated Maria Sharapova and Ashleigh Barty on her way to Friday's quarter-final, with the Czech world No.7 claiming a 6-4 6-2 win.

The 2011 Brisbane champion faces another American, 2017 US Open finalist Madison Keys, in Saturday's semi-finals at Pat Rafter Arena.

Kvitova revealed she had seen a photo of her from her 2011 triumph earlier in the day and it had brought home how career-defining that success had been for the 29-year-old.

"When I see that photo, I do remember that great season I had, which I won at Wimbledon and the WTA Finals in the end of the year, so it was a great season from it," she said.

"It was my first big tournament and, yeah, it was a good one."

Keys was the first woman into the semi-finals on Friday, claiming a comfortable 6-4 6-1 win over compatriot Danielle Collins.

The victory over world No.27 Collins lifts Keys up to No.11 in the rankings and she heads into Saturday's semi-final with a 3-3 head-to-head career record against Kvitova.

"Petra is Petra - great serve, great forehand," Keys said.

"It seems like every year she comes out and she's gotten something else in her game a little bit better and it just makes her even tougher to play."

Reigning Australian Open champion Naomi Osaka is also into the last four after coming through a three-set tussle with Dutch world No.9 Kiki Bertens.

The Japanese third seed claimed the first set before Bertens recovered to take the match into a decider.

However, Osaka dominated the third set to secure a 6-3 3-6 6-3 win and her second semi-final berth in Brisbane after reaching the last four in 2019.

The world No.4 will next meet defending champion and second seed Karolina Pliskova of the Czech Republic. Pliskova on Friday night overcame American Alison Riske 7-6 (8-6) 6-3.