At the 1987 World Championships in Athletics he placed 35th – the only African in the race. He and Mohamed Bouhalla formed the African contingent at the 1988 Seoul Olympics. Ferguène finished ahead of his countryman and gave his best championship performance with a time of 1:26:33 hours for 32nd place. The younger Bouhalla was fast improving, however, and Ferguène ended up silver medallist behind him at both the 1988 and 1989 African Championships in Athletics. Ethiopia's Shemsu Hassan dipped under an hour and a half to leave Ferguène as runner-up at the 1990 African Championships in Athletics and the 1991 All-Africa Games.