Rubuta ci gaba don wannan sakin layi - Grouillard ya shiga kungiyar Italiya ta Osella, yana zama 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
Ka yi haƙuri. Biyu a jere ƙare a waje da saman 10 a Kanada da Mexico da aka bi da wani matalauta gudu a pre-cancanta domin Faransa, kawo karshen sama ba cancanta ga tseren da a Silverstone da kuma Hockenheim, inda ya kuma kasa cancanta tare da wani gazawar ga pre-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.