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Nick Kyrgios has the best serve of all time on the ATP tour, Andy Roddick in the top 5: Serena Williams' former coach Patrick Mouratoglou
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USA's Andy Roddick in his match against Czech Republic's Tomas Berdych during day four of the Barclays ATP World Tennis Tour Finals at the O2 Arena, London Stock Photo - Alamy
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Where Andy Roddick Ranks Among the Top U.S. Men of All Time | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
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