Siffert akasiya chikwata pakupera kwa1969, apedza gore ari pachinzvimbo che9, uye Rob Walker Racing Team yakakwikwidza kekupedzisira muna 1970, ichipinda muLotus 72 yemutyairi Graham Hill, uyo akanga ava nemakore 40, uye akaramba kuenda pamudyandigere mushure metsaona huru mugore rapfuura naLotus. Chibodzwa chakanakisisa chaHill chaiva chinzvimbo chechina paSpain GP
, asi akaenda kunobatana naBrabham pakupera kwegore.