At the 1988 African Championships in Athletics, he was again beaten into second place by Egbunike. The Côte d'Ivoire team managed a silver medal in the relay event. Tiacoh represented his country at the Olympics for a second time, but he could not repeat his medal success and was eliminated in the quarter-finals after finishing in fifth place. He helped the Ivorian relay team to the Olympic semi-final, but they finished in sixth position and did not qualify for the final.