The range of each weight class is adjusted by one kilogram to four kilograms for these Games, marking the first redefinition since 1920. 

Greece, China, Russia and Turkey all win two gold medals each, and three silver medals for the Greeks see them top the medals table.

There is a third Olympic title for Naim Süleymanoğlu, while Pyrros Dimas and Kakhi Kakhiashvili claim their second gold medals.