Their relationship became so well known thanks to a particular kind of public venom that flourished between them, from 1989 and the Frenchman's retirement in 1993 (the above photo is from happier days, in 1988). Their on-track rivalry was the greatest in F1 since James Hunt and Niki Lauda, and it could be argued that there is no match for it today.
According to Prost, though, there was more to the relationship, and the two grew closer before the Brazilian's tragic and untimely death at the 1994 San Marino Grand Prix. He even served as a pallbearer at Senna's funeral.
Prost writes about their brutal rivalry and what Senna's death meant to him over at Autoweek. It's really a must-read piece on this sad 20-year anniversary of Ayrton's passing. Take a look, and let us know what you think in Comments.