 Complete the following phrase:  Grouillard joined Ligier to fill in the seat left by Stefan Johansson and was the team-mate to René Arnoux for 1989. He qualified 22nd in his first race in Brazil and finished 9th. At Imola, he overcame spinning his car to start in 10th, but was disqualified when mechanics worked on his car during a red flag stint, caused by the accident of Gerhard Berger at Tamburello. He started outside the top 10 at 