Ayrton Senna, McLaren, Phoenix, 1991 Link to this image full-size: https://www.racefans.net/2021/07/08/how-formula-1-got-its-tenth-different-points-system/usa-grand-prix-phoenix-usa-08-10-03-1991-49/Ayrton Senna, McLaren, Phoenix, 1991Advert | Become a RaceFans supporter and go ad-freeAyrton Senna, McLaren, Phoenix, 1991Next Image