Russia's Egor Mekhontcev took light-heavyweight gold after the tightest contest possible against Kazakhstan's Adilbek Niyazymbetov.
The bout was scored 15-15 and the fighters could not even be separated by countback, with Mekhontcev winning courtesy of the judges' individual preference.
Yamaguchi Falcao of Brazil and the Ukraine's Oleksandr Gvozdyk won bronze.