Wladimir Klitschko will defend his heavyweight titles against Alexander Povetkin in Moscow's Olympic Stadium on October 5, it has been confirmed.
Klitschko puts the WBA, IBF, WBO and IBO belts on the line against the undefeated 'regular' WBA champion, who is widely regarded as one of few viable threats to the long-time heavyweight king.
The big-money bout, which promises to provide both fighters with career-high pay-cheques, has been on-and-off for the last three years with the Russian at times appearing unwilling to square up to Klitschko.
Povetkin gained mandatory status when picking up the WBA's regular belt after Klitschko was afforded 'super champion' status on beating then title holder David Haye in 2011.
Former Olympic champion Povetkin has compiled a 26-0 record but has taken a long time to convince critics of his ability to compete at the highest level.
In 2012 he was considered by many to have been given a favourable decision over cruiserweight champion Marco Huck, while his most recent defences have been against a completely shot Hasim Rahman and over-matched Pole Andrzej Wawrzyk.
Klitschko (60-3) has long-since run out of genuine title contenders to fight - his latest victory coming over former sparring partner Francesco Pianeta in May.