From the Ukraine, Sergi started doing gymnastics at the age of five. He eventually joined the national team and won the European Championships while playing an active part in the world.
He retired at the age of 21.
Since 2007, he has been teaching gymnastics to children at the Mac Gymnastics Club (Abeno-ku, Osaka-shi), a prestigious gymnastics School, that has produced many medalists, including Yukio Ikeya, Isao Yoneda and Hiroyuki Tomita.
A top class instructor with a deep passion for the sport, Sergi continues to teach infants, teenagers and adults.