Formula One legend Alain Prost has just "one big regret" -- his portrayal in an award winning film about his arch rival -- the late, great Ayrton Senna.
Four-time world champion Prost battled the Brazilian for title supremacy while they both drove for McLaren with their rivalry reaching its peak in the finale to the 1989 and 1990 seasons
So much so that incidents on the first corner of races at Suzuka in Japan saw the pair force each other off the road.
Prost was the beneficiary in 1989 after Senna, who was able to carry on, was controversially disqualified to give the Frenchman the world championship.
Twelve months on, Senna's ruthless move on Prost, who had quit McLaren to drive for Ferrari, gave him the crown in a reversal of fortunes and left the men at odds.
Prost, who won his final world title in 1993, had retired by the time Senna was killed at Imola in the San Marino GP of 1994.
Fateful weekend
No one has died in F1 racing since that fateful weekend and it provided the producers of the movie with a chilling conclusion which left many film goers in tears as they left cinemas.
But Prost, who co-operated on the award winning film "Senna", is unhappy that his subsequent reconciliation with Senna is not featured.
"The only regret that I have in my career is to see this kind of film that we are having on Ayrton," he told CNN in an exclusive interview for The Circuit.
"You need to tell everything right, correct, and you need to accept that you can have some qualities, some faults and one cannot be white and the other black.
"I am very disappointed about that because it would have been good at my age to have shown to the people, to the world, that it was a little bit different.
"But for me, inside me, I know what happened, I know the story, I know how Ayrton was just before his accident after I retired, I keep that for me. "
Senna scriptwriter Manish Pandey defended Prost's portrayal in the film but admitted it was "very, very diffficult to compress those 10 years (of the F1 legend's career) into 100 minutes."
He told CNN: "Alain (Prost) was very kind in giving us time and we put seven examples of reconciliation between him and Ayrton at the end of the film."
Biggest regret
Pandev also revealed that they had tried their best to insert a video clip of a lap by Senna in which he drove the Imola track and did a commentary for French TV station TF1 (for whom Alain was broadcasting) saying 'To my friend, Alain. We miss you Alain.'
But the clip was muffled and unusable in the context of the end of the film, he claimed.
In a doubly tragic weekend for F1 back in 1994 at Imola, Austrian driver Roland Ratzenberger had been killed in qualifying on the Saturday.
Senna drove in the race with a small Austrian flag in his race suit, which he was going to wave to honor Ratzenberger, at the finish to show the unity of F1.
"If we omitted something, it was this more than anything else. And we tried to get it in, but the footage wasn't there," Pandev said.
"Sporting rivalries, who did what to whom, who was disqualified, who won a trophy - all of that pales into utter insignificance in the context of the bigger story.
"Senna is not a film about a sporting rivalry, because we would have called it 'Senna vs Prost' and started it later and ended it earlier, if it was. The rivalry was an important element in our story - but it was just one of many."
Prost is still intensely proud of the era which saw the pair dominate F1 racing.
"Today if you say Prost you say Senna. It is part of the F1 history and in my opinion is maybe the best years."
