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Dalma Galfi, Hungary, in action against Sofia Kenin, USA, in the Junior Girls' Singles Final during the US Open Tennis Tournament, Flushing, New York, USA. 13th September 2015. Photo Tim Clayton (Photo by Tim Clayton/Corbis via Getty Images)

Dalma Galfi, Hungary, in action against Sofia Kenin, USA, in the Junior Girls' Singles Final during the US Open Tennis Tournament, Flushing, New York, USA. 13th September 2015. Photo Tim Clayton (Photo by Tim Clayton/Corbis via Getty Images)