Korchinsky also trained Olympic participants Sergei Kovganko and Oleg Mashkin. He became the winner of the World Series of Boxing (WBS) twice, once with the Italian Milano Thunder team, and the second time with the Kazakh Astana Arlans.
In April 2018, during a conflict with an unknown person, Sergei Korchinsky received a head injury, as a result of which he ended up in a coma and subsequently underwent severe and lengthy treatment.