Which South African professional boxer did  Cedric Kushner managed
Corrie Sanders Cornelius Johannes "Corrie" Sanders (7 January 1966 – 23 September 2012) was a South African professional boxer who competed from 1989 to 2008. He won the WBO heavyweight title in 2003 after stopping Wladimir Klitschko in two rounds, which was considered one of the biggest upsets in heavyweight boxing history; "The Ring" magazine named it the Upset of the Year. In 2004, having vacated the WBO title, Sanders faced Wladimir's brother Vitali Klitschko in an unsuccessful challenge for the vacant WBC and "Ring" heavyweight titles.
Andrey Kurnyavka Andrey Petrovich Kurnyavka (Russian: Андрей Петрович Курнявка , born 4 May 1968) is a retired Soviet and Kyrgyzstani amateur boxer. He won the world middleweight title in 1989, and finished second in 1991, but was not included to the 1992 Soviet Olympic team and retired from boxing. He went out of retirement after a last-minute offer to compete for Kyrgyzstan at the 1996 Summer Olympics, but lost in the first bout to the eventual winner Félix Savón.