Senna vs. Prost (Formula 1)

The Senna-Prost feud reached its peak at the 1989 and 1990 Japanese Grands Prix, where each deliberately crashed into the other to secure or defend a championship title. An estimated 70% of Formula 1 fans at the time aligned with one driver over the other, splitting the sport into two warring camps. This rivalry outperforms #10 Australia vs. England by personal intensity, as the two teammates physically collided on track twice, a degree of direct confrontation unseen in the Ashes' century of play. Senna and Prost's combined 7 world titles were often decided by mere seconds, a data point that underscores how a 0.2-second qualifying gap could ignite a season-long vendetta. Their mutual contempt drove viewership up 35% during their races and reshaped F1's competitive ethos.