Ghasem Gholamreza Rezaei of Iran won the Olympic gold medal Tuesday in 96 kg Greco Roman wrestling.He beat Russia's Rustam Totrov 2,0, 1,0 to become Iran's third Greco Roman champion in three days.Rezaei was 16th at the Beijing Games in 2008, but a number of upsets helped clear the way for him and Totrov to meet in the finals.