(FILES) Paris Saint-Germain's Spanish head coach Luis Enrique arrives for a press conference of French football club Paris Saint-Germain a day ahead of their UEFA Champions League semi-final match against German club FC Bayern Munich at the PSG Campus in Poissy, north-west of Paris, on April 27, 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 FRANCK FIFE / AFP via Getty Images)