Editor's note: Just before the US Open, 2017 International Tennis Hall of Fame inductee Steve Flink spoke at length with Diego Schwartzman, currently ranked 33rd in the world. The 25-year-old ...

Diego Schwartzman, apparently, has a twin...if that twin was an American that was at least 15 inches taller. At the Laver Cup, the world No. 14 introduced his Team World teammate John Isner.