Unified world heavyweight champion Anthony Joshua says a health issue left him "tired" and "drained" in the build-up to his June defeat by Andy Ruiz Jr.
The 30-year-old reclaimed his world titles in Saudi Arabia yesterday dominating the Mexican over 12 rounds.
Conspiracy theories had circulated after his initial defeat, one of the biggest shocks in heavyweight history.
Joshua told the BBC that after his check-ups it showed what the problem was.
He says he had an operation done but as he started training in June he had no issues.
Joshua refused to say what the operation was but it is understood the procedure he had in June was linked to the issue diagnosed after his defeat by Ruiz.
BBC
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