In 1964, British racing driver John Surtees won the drivers' championship driving for Scuderia Ferrari. Surtees had previously won multiple world championships in motorcycle racing, and his victory in Formula One made him the only person to have won world championships on both two wheels and four. Surtees' championship-winning season was a closely fought battle, with him winning two races and finishing on the podium in seven of the ten races that season. His main rivals for the championship were Graham Hill and Jim Clark, but Surtees was able to clinch the title in the season-ending Mexican Grand Prix. Surtees had joined the Ferrari team in 1963 and had initially been signed as a test driver. He had impressed the team with his speed and consistency, and was promoted to a race seat for the 1964 season. Surtees' championship win was significant for Ferrari as it marked the team's first drivers' championship since 1961, and the first with a British driver. Surtees remained with Ferrari for two more seasons, achieving further race victories, but was unable to replicate his championship success. Surtees' achievement of winning world championships in both motorcycle racing and Formula One remains a unique feat, and he is widely regarded as one of the greatest racing drivers of all time.