Russia claimed their second Greco-Roman wrestling gold medal when Khasan Baroev won the 120kg category.
Baroev beat Kazahkstan's Georgiy Tsurtsumia to emulate compatriot Alexei Michine who beat Sweden's Ara Abrahamian in the 84kg class.
Hungarian Istvan Majoros won the 55kg category after defeating veteran Russian Gueidar Mamedaliev 3-1.
Azerbaijan's Farid Mansurov saw off former world champion Seref Eroglu of Turkey 4-3 to win the 66kg class.
Former Olympic champion Rulon Gardiner of the USA announced his retirement after only winning bronze in the 120kg category.
Gardner caused one of the biggest upsets in
wrestling history when he beat legendary Russian Alexander Karelin in Sydney four years ago.