Kammala jumla mai zuwa: Grouillard ya shiga kungiyar Osella ta Italiya, yana zama a wurin Nicola Larini, wanda a biyun ya ɗauki wurin Grouillard a Ligier. Ba shi da abokin tarayya a shekarar 1990 yayin da Osella ke fama da matsalar kudi ya rage ayyukan su, ma'ana Grouillard ya cancanci cancanta don tseren. Ya sami damar cancanta a 8th a Phoenix a gaban Nigel Mansell da Alessandro Nannini wanda ya ba da mamaki ga mutane da yawa a cikin Formula One. A lokacin tseren, Riccardo Patrese's Williams ya buge Grouillard a karo na biyu kuma daga karshe ya yi ritaya bayan karo na biyu da direban Switzerland Gregor Foitek. A Brazil, ya yi ritaya bayan wani karo da ya shafi Michele Alboreto. Don Imola an inganta motar, amma hakan bai taimaka wa ƙungiyar ba yayin da Grouillard ya yi ritaya (ba kafin ya toshe Mansell a cikin cancantar ba kuma ya lalata aikin cancantar Ferrari, ya sami ɗan Faransa daga Mansell, kuma ba a karo na ƙarshe ba). Ya kuma kasa cancanta a Monaco. Biyu a jere ƙare a waje da saman 10 a Canada da kuma
Mexico ta biyo baya tare da mummunan gudu a cikin cancantar shiga gasar Faransa, ta ƙare ba ta cancanci shiga tseren ba kuma a Silverstone da Hockenheim, inda shi ma ya kasa cancanta tare da wani rashin nasarar cancanta a Hungary. Grouillard ya gama na 16 a Spa tare da yin ritaya a Monza da Jerez tare da matsalolin da ke dauke da ƙafafun da ke damun Faransanci a duk shekara.