(FILES) Manchester City's Spanish manager Pep Guardiola gestures on the touchline during the UEFA Champions League, round of 16 second leg football match between Manchester City and Real Madrid at the Etihad Stadium in Manchester, north west England, on March 17, 2026. Has everything in football already been invented? Last few years, two Spanish coachesPep Guardiola and Luis Enriquehave revolutionized the world's most popular sport with defensive and offensive strategies inspired by other sports, such as rugby or water polo. Set-piece goals, particularly from corners, became a major talking point thanks to the Arsenal side managed by Spanish coach Mikel Arteta. (Photo by Oli SCARFF / AFP via Getty Images)