The Slacker 2 2014 one on netflix

The protagonist of the film is a very famous boxer in the past, now he works as an ordinary security guard in a jewelry store and is deeply in love with an employee of this store, whose name is Katerina. But once his beloved woman was undeservedly insulted, and the former boxer, like a true knight and man, intercedes for his beautiful lady and quarrels with very influential people of the city.