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Roger Federer of Switzerland hits a ball during a practice session prior to the 2015 U.S. Open at the USTA Billie Jean King National Tennis Center in the Flushing neighborhood of the
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We Are Tennis on Twitter: "Roger #Federer at practice in Dubai. (Photo @moutet99) https://t.co/NhHIsdu6D8" / Twitter
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Swiss tennis player Roger Federer practices during a training session for the 2010 Shanghai Rolex Masters in Shanghai, China, October 11, 2010 Stock Photo - Alamy
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