Frances Tiafoe and Ben Shelton face off in the U.S. Open semifinals on Friday night aiming to end a long drought for American men in Grand Slam tournaments. Andy Roddick was the last U.S. man to win a major back in 2003. Since then European players have dominated. Juan Martín del Potro, the last non-European champion, believes American tennis has the potential to break this pattern. Del Potro is now an analyst for ESPN Latin America and has shared insights on his career and offered advice to Carlos Alcaraz on managing injuries. Del Potro retired in 2022 after multiple surgeries.