Career
He is now a tennis coach in Le Pradet. He qualified for his first Grand Slam in 1988, the French Open. He played Brazilian Marcelo Hennemann in the opening round and lost in four sets.
Also that year, Grenier made the semi-finals of the Lorraine Open, again partnering Delaître.
The Frenchman appeared at Roland Garros again in 1990 and this time managed to progress past the first round, beating Jeremy Bates of Britain in straight sets. He was eliminated from the tournament in the second round by Aaron Krickstein.