Kalli The Champion is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here.
After giving up his dream as a boxer, Park Kang-tae joined a gang. He was well-known inside the gang but got killed in the end. He had one regret when he died―Giving up his dream as a boxer. Did God know about his regret? In a world, where boxing exists in the form of pugilist games, Park Kang-tae pursues his unfulfilled dream. Prizefighter Kalri Boxer Carly Boxer Kali Carly the Boxer 권투사 칼리