Key Points:

Evander Holyfield can become a world heavyweight champion for the fifth time when he fights Russia's undefeated Sultan Ibragimov on October 13 in Moscow.

Six days before his 45th birthday, Holyfield will fight for the lesser-regarded World Boxing Organisation (WBO) crown after the withdrawal of Uzbek Ruslan Chagaev, the World Boxing Association champion, from a scheduled fight with Ibragimov.

Holyfield would not become the oldest champion in heavyweight history as George Foreman knocked out Michael Moorer in 1994 at 45 years and nearly 10 months of age to claim the WBA and International Boxing Federation titles.