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PRAGUE, CZECH REPUBLIC - NOVEMBER 10: Barbora Strycova of Czech Republic celebrates after winning the match against Sofia Kenin of USA after the Fed Cup Final between Czech Republic and USA at O2 Arena on November 10, 2018 in Prague, Czech Republic. (Photo by Srdjan Stevanovic/Getty Images)

PRAGUE, CZECH REPUBLIC - NOVEMBER 10: Barbora Strycova of Czech Republic celebrates after winning the match against Sofia Kenin of USA after the Fed Cup Final between Czech Republic and USA at O2 Arena on November 10, 2018 in Prague, Czech Republic. (Photo by Srdjan Stevanovic/Getty Images)

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PRAGUE, CZECH REPUBLIC - NOVEMBER 10: Barbora Strycova (R) of Czech Republic celebrates with team captain Petr Pala after winning the match against Sofia Kenin of USA after the Fed Cup Final between Czech Republic and USA at O2 Arena on November 10, 2018 in Prague, Czech Republic. (Photo by Srdjan Stevanovic/Getty Images)

PRAGUE, CZECH REPUBLIC - NOVEMBER 10: Barbora Strycova (R) of Czech Republic celebrates with team captain Petr Pala after winning the match against Sofia Kenin of USA after the Fed Cup Final between Czech Republic and USA at O2 Arena on November 10, 2018 in Prague, Czech Republic. (Photo by Srdjan Stevanovic/Getty Images)

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PRAGUE, CZECH REPUBLIC - NOVEMBER 10: Barbora Strycova (L) of Czech Republic celebrates with Petra Kvitova (R) after winning the match against Sofia Kenin of USA after the Fed Cup Final between Czech Republic and USA at O2 Arena on November 10, 2018 in Prague, Czech Republic. (Photo by Srdjan Stevanovic/Getty Images)

PRAGUE, CZECH REPUBLIC - NOVEMBER 10: Barbora Strycova (L) of Czech Republic celebrates with Petra Kvitova (R) after winning the match against Sofia Kenin of USA after the Fed Cup Final between Czech Republic and USA at O2 Arena on November 10, 2018 in Prague, Czech Republic. (Photo by Srdjan Stevanovic/Getty Images)

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Members of Czech Fed Cup team, Lucie Safarova, Barbora Krejcikova, Captain Petr Pala, Katerina Siniakova, Barbora Strycova and Petra Kvitova celebrate with the trophy after the Fed Cup World Group final tennis match between Czech Republic and United States on November 11, 2018 in O2 Arena in Prague. (Photo by Michal Cizek / AFP) (Photo credit should read MICHAL CIZEK/AFP/Getty Images)

Members of Czech Fed Cup team, Lucie Safarova,  Barbora Krejcikova, Captain Petr Pala, Katerina Siniakova, Barbora Strycova and Petra Kvitova celebrate with the trophy after the Fed Cup World Group final tennis match between Czech Republic and United States on November 11, 2018 in O2 Arena in Prague. (Photo by Michal Cizek / AFP)        (Photo credit should read MICHAL CIZEK/AFP/Getty Images)