Francois Botha is hoping to fight Sonny Bill Williams in Durban in December.
The South African heavyweight who lost to Williams in Brisbane last week also revealed on Wednesday that he had undergone a drug test at the Lancet Laboratories in South Africa, which came back negative.
"I landed in South Africa on the Sunday, and the next day I went for the tests, and it came back clean," he said.
"I sent the results back to Australia and New Zealand for them to see for themselves.”
Australian newspapers reported earlier this week that Botha, a former IBF champion, had tested positive for illegal substances in tests done before the fight against the All Black rugby star.
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