The 1958 championship came down to a finely balanced piece of arithmetic. Stirling Moss, driving a Vanwall, needed to win the season's final round at Casablanca and set the race's fastest lap, while also hoping that Mike Hawthorn's Ferrari finished no higher than third — the combination that would give Moss the title by a single point. Anything less, and Hawthorn would become Britain's first World Champion.
Moss delivered his half of the equation perfectly, dominating the race from the front and setting the fastest lap along the way. But Hawthorn, driving a controlled, disciplined race, finished second — behind only Moss himself — which was enough, by the tightest possible margin, to hand Hawthorn the championship instead.
What made the result feel, to many who followed the sport closely, like more than simple misfortune was a piece of sportsmanship Moss himself had shown Hawthorn two races earlier, at the Portuguese Grand Prix in Porto. Hawthorn had spun his Ferrari and stalled it facing the wrong way on a banked section of the circuit; unable to bump-start it downhill in the conventional direction, he push-started it briefly against the flow of traffic before rejoining. Race officials considered disqualifying him for receiving outside assistance and for rejoining against the direction of the circuit. Moss — then still very much Hawthorn's title rival, with everything to gain from Hawthorn's exclusion — voluntarily testified to the stewards that Hawthorn had, in fact, bump-started the car by himself, without help, and that his manoeuvre had been legal. The stewards accepted his account. Hawthorn kept his points.
Those points, scored at Porto because of testimony freely volunteered by his direct championship rival, proved to be exactly the margin by which Hawthorn beat Moss to the title at Casablanca weeks later. Moss never expressed public regret for what he had done, insisting decades afterward that he would do the same again — a story that, more than the race result itself, became the defining anecdote of the entire 1958 season.