1970 Mexico World Cup hailed as modern football's turning point

The 1970 tournament in Mexico is described as a watershed for the sport. It was the first World Cup broadcast live in colour worldwide via satellite, giving viewers a vivid visual experience. The competition introduced the yellow card for cautions, a system devised by English referee Ken Aston, and allowed two substitutions per match, changing how teams managed injuries.

Beyond the on‑field innovations, the event marked the start of modern football marketing. The iconic black‑and‑white “Telstar” ball was designed for easy visibility on monochrome TVs, and the tournament’s global exposure helped intertwine branding and the sport. Together, these changes set a new standard for future World Cups and professional football.