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German Mona Barthel poses with the trophy after winning over Czech's Kristyna Pliskova during their final tennis match at the Prague Open on May 6, 2017 in Prague. / AFP PHOTO / Michal Cizek (Photo credit should read MICHAL CIZEK/AFP via Getty Images)

German Mona Barthel poses with the trophy after winning over Czech's Kristyna Pliskova during their final tennis match at the Prague Open on May 6, 2017 in Prague.  / AFP PHOTO / Michal Cizek        (Photo credit should read MICHAL CIZEK/AFP via Getty Images)