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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Tall timber: 198cm-tall Alexander Zverev (R) beat 208cm-tall John Isner (L) in the first round in Shanghai; Getty Images | Tennismash
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Laver Cup 2021: Alexander Zverev vs John Isner LIVE stream: When, Where, and How to Watch » FirstSportz
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Zverev pushes through big-serving Isner - Official Site of the 2021 US Open Tennis Championships - A USTA Event
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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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