Robert Kubica has revealed his rivals accused him of doping when he won karting championships in Italy early in his career. Kubica has always been considered one of the top talents of his generation along with the likes of Lewis Hamilton and Sebastian Vettel, who have 10 Formula 1 titles between them. Unfortunately, his rally crash in 2011 meant Kubica never reached the heights most expected him to, but when he was starting to show his potential as a teenager, others were sceptical.