Oleksandr Usyk is a Ukrainian professional boxer born on January 17, 1987. He is widely recognized for becoming the undisputed cruiserweight champion in 2018, holding all four major world titles. Usyk later transitioned to the heavyweight division, where he has also achieved significant success, including winning the WBA (Super), IBF, WBO, and IBO heavyweight titles. Known for his exceptional skill, agility, and intelligence in the ring, Usyk is considered one of the best pound-for-pound boxers in the world.