Hamza Yerlikaya's first international competition was in 1991 World Cadets Wrestling Championships in Quebec, Canada, in which he got the fourth place. His first senior international event was the 1993 European Wrestling Championships in Istanbul where he got the second place, losing to Thomas Zander in the finals. He surprised some of the spectators who thought this was a coincidence by winning the gold medal in 1993 World Wrestling Championships in Stockholm, Sweden at the age of 17, and hence becoming the youngest ever World Champion in wrestling.