Freestyle wrestling is a style of amateur wrestling that is practiced throughout the world. Along with Greco-Roman, it is one of the two styles of wrestling contested in the Olympic games. It is, along with track and field, one of the oldest organized sports in history.^{[citation needed]}American high school and college wrestling is conducted under different rules and is termed scholastic and collegiate wrestling.

Freestyle wrestling, like collegiate wrestling, has its greatest origins in catch-as-catch-can wrestling and, in both styles, the ultimate goal is to throw and pin your opponent to the mat, which results in an immediate win. Freestyle and collegiate wrestling, unlike Greco-Roman, also both allow the use of the wrestler's or his opponent's legs in offense and defense. Freestyle wrestling is the most complete style of standup wrestling and bring together traditional wrestling, judo and sambo techniques.

According to the International Federation of Associated Wrestling Styles (FILA), freestyle wrestling is one of the four main forms of amateur competitive wrestling that are practiced internationally today. Others of the main forms of wrestling are Greco-Roman and Grappling (also called submission wrestling).

Sergei Alekseevich Beloglazov (Russian: Сергей Алексеевич Белоглазов) (born September 16, 1956 in Kaliningrad) is one of the greatest modern wrestlers. He trained at the Armed Forces sports society in Kaliningrad in 1976-77 and at Dynamo in Kiev since 1979. He was a two-time Olympic Champion in 1980 and 1988, a six-time World Champion and a World Silver medalist. He has a twin brother Anatoli Belaglazov, who was an Olympic Champion in 1980 and a three-time World Champion. He wrestled for coach Granit Taropin for the former Soviet Union.

Currently, Sergei is serving as the head coach for the Wrestling Federation of Singapore.

Currently (as of April 2009) Sergei is the National Head Coach of the Wrestling Federation of Singapore.