In the 1979 German Grand Prix Clay Regazzoni was instructed by the Williams pits not to attack his teammate Alan Jones for the lead, despite Regazzoni being ahead in the championship. The status of Jones as number one driver at Williams lasted until 1981, when Carlos Reutemann deliberately ignored team orders at the 1981 Brazilian Grand Prix and did not allow him to pass. This resulted in a long feud between the two that eventually led to Jones' retirement at the end of the season, with Reutemann missing out on the World Championship for one single point.