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John Isner will be a tough prospect for world's best on clay, says Greg Rusedski | Tennis News | Sky Sports
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Zverev pushes through big-serving Isner - Official Site of the 2021 US Open Tennis Championships - A USTA Event
10sBalls.com - Sloane Stephens, Alexander Zverev, John Isner and Renata Zarazua pose during an exhibition game as part of Mexican Tennis Open tournament, in Acapulco, Mexico. Check out the full Gallery on
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ATP Finals: Alexander Zverev vs John Isner, Novak Djokovic vs Marin Cilic | Tennis News | Sky Sports
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Miami Open: John Isner beats Alexander Zverev to win first Masters 1000 title- The New Indian Express
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