Frazer Clarke beat Tsotne Rogava with power and precise punches as the GB team super-heavyweight ended a 12-year wait for his Olympic debut.
The 29-year-old had patiently prepared for his first Olympic appearance and successfully scored it sealing a 4-1 point victory over his Ukrainian opponent.
Clarke won the gold medal at the 2018 Commonwealth Games and tries to emulate the success of Anthony Joshua, who won the super heavyweight tournament in London 2012.
He had said before Air sports: “I am a smart boxer, I am experienced.
“I probably need a better defense! I’m always in exciting fights, people tell me I’m exciting for one reason or another!
“I hand it out, I have quick hands, good thinking, good feet, I’m strong, I can really box. When it’s time to squeeze and bite the mouthguard? I can do that too.”
But Clarke will have to overcome a dangerous crop of rivals, which includes No.1 seed Bakhodir Jalolov, who worryingly advanced in his first fight.
The Uzbek fighter, who has eight wins as a professional, forced Azerbaijani Mahammad Abdullayev to receive a tally in a dominant victory on points.