September 6, 1980
On February 6, 2001, in Almaty, Kazakhstan, he knocked out Georgi Hristov in three rounds.
won the world title
On October 6, 2007, in New York's Madison Square Garden, he defeated Jameel McCline by unanimous decision to become interim WBC heavyweight champion. On March 8, 2008, in Cancun, he became WBC absolute monarch, by knocking out Russian Oleg Maskaev.
Lost His Title
In his first defense, on October 11, 2008, in Berlin, Germany, Vitali Klitschko defeated him early in the ninth round.
On September 27, 2014, in Oklahoma, he knocked out Ron Aubrey