Duah was born in
Kumasi, Ghana. After his exploits at the
1991 FIFA U-17 World Championship, 15-year-old Duah was bought by
Serie A club
Torino FC, alongside teammates
Mark Edusei,
Mohammed Gargo and
Samuel Kuffour. He never appeared officially for the Italians, and also had a very difficult time at his following team,
Standard Liège in Belgium. After two years in Turkey with as many clubs, Duah joined
RCD Mallorca in the Spanish
second division, being sparingly used as the
Balearic Islands side
promoted to
La Liga. His next stop – also in the second level – would be his most productive and steady, as he played five years with
U.D. Leiria from
Portugal, also attaining promotion in
his debut season with a career-best 11 goals in only 18 games. Duah was used regularly by Leiria in the following
Primeira Liga campaigns, but only appeared in ten matches in
2001–02 (three goals) as the
José Mourinho-led team
qualified to the
UEFA Intertoto Cup after finishing seventh. Subsequently, released he continued in the country, playing two seasons with
Gil Vicente F.C. also in the top flight. Duah closed out his career in 2008 at nearly 32, after two-year spells in Lebanon and Israel with
Nejmeh and
Hapoel Acre, respectively. ==International career==