Lennox Lewis has told Russian promoters that he will come back to fight one of the Klitschko brothers for the biggest purse in boxing history, informs Mail Online. The 48-year-old, who is still the most recent undisputed world heavyweight champion, was offered $50million (£31.3m) in Moscow at the weekend while attending Wladimir Klitschko’s successful defence of his world titles against Alexander Povetkin. Lewis responded by promising to return to the ring for $100m (£62.6m). The promoters are considering doubling their bid and Lewis says: ‘That is my price tag and it is under discussion. I have told them I can be ready in six months and I am in provisional training.’ As reported earlier, Lewis quit the sport after retaining multiple world titles against Vitali Klitschko in June 2003, initially promising to fight on but later backtracking. His record stands at 42-2-1, and he is widely regarded as the last great heavyweight.