There are few people, if any at all, better qualified to talk about Ayrton Senna the racing driver than Ron Dennis, his boss at McLaren.
As the 20th anniversary of the three-time world champion's death looms large, the Formula 1 world is diverting its gaze briefly from its current battles to ponder the life, impact and legacy of the man who many consider to have been the greatest grand prix driver of them all.
It's Dennis's voice, however, that perhaps carries the greatest resonance at moments like this. For his and the Brazilian's relationship was not just a successful sporting partnership - it went much deeper than that.
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