It was a warm Buenos Aires afternoon in 2004, and a teenage Lionel Messi was still a shy, diminutive winger at Newell’s Old Boys. Diego Maradona, then a revered figure in Argentine football, spotted the prodigy practicing alone and decided to test his limits. “Run from the left flag to the right and back, five times, without stopping,” Maradona instructed, a grin playing on his lips. The young Messi, eyes burning with determination, sprinted the full length of the pitch repeatedly, his dribbles becoming more fluid with each lap. That impromptu drill, witnessed by a handful of scouts, is now legend—an early glimpse of the relentless drive that would later redefine the sport.