Mercedes driver Lewis Hamilton has explained why and how the helmet exchange between himself and Sebastian Vettel happened, as the two rivals came together post-race in Abu Dhabi last month to swap helmets. The two have been battling it out on the track for over a decade now, becoming each other's title rivals every year in recent times. This season, Vettel looked to be seriously contending for the title at first, but Hamilton ran away with it eventually. Still, despite some accidents and moments on track, the two have tremendous respect for each other. With nine titles between them, it's rare to see winners of their calibre going up against each other while both being in their primes....
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