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In page Michael Moorer:

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Because of the controversial nature of the Foreman-Schulz bout, the IBF ordered Foreman to travel to Germany for a rematch, but Foreman refused, choosing to leave the IBF belt vacant instead. South African Francois Botha travelled to Germany instead and beat Schulz with another close decision to claim the title, but he was stripped of it when he tested positive for illegal substances shortly after.