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Petra Kvitova finds killer instinct when in 'bubble', says coach Jiri Vanek | Sports News,The Indian Express
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Petra Kvitova, Karolina Pliskova exchange coaches; Johanna Konta splits with Esteban Carril-Sports News , Firstpost
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Petra Kvitova Needs To Find 'Killer Instinct' Against Osaka At Australian Open, Says Coach - UBITENNIS
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