John Isner is a former professional tennis player from the United States, widely recognized for his powerful serve, sportsmanship, and record-breaking performances. Standing at 6’10”, Isner turned pro in 2007 and quickly became a force on the ATP Tour. He reached a career-high singles ranking of World No. 8 in 2018 and captured 16 ATP singles titles during his career, including a memorable victory at the Miami Open that same year.

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Isner is perhaps best known for competing in the longest match in tennis history—an epic 11-hour, 5-minute marathon against Nicolas Mahut at Wimbledon in 2010. A mainstay in the ATP Top 20 for over a decade, he also played a pivotal role in representing the U.S. in Davis Cup play.

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With his signature serve and relentless determination, John Isner leaves behind a legacy as one of the most formidable and respected American tennis players of his generation.