Sergey Kovalev is a professional boxer from Russia, known for his powerful punching and technical skills in the ring. Born on April 2, 1983, he has competed in the light heavyweight division and has held multiple world championships, including the WBA, IBF, and WBO titles. Kovalev is often referred to by his nickname, "Krusher," due to his knockout ability. Kovalev began boxing at a young age and quickly rose through the ranks, gaining recognition for his impressive performances. He has faced several notable opponents throughout his career, including Andre Ward and Canelo Alvarez, contributing to his reputation as one of the top fighters in his weight class.