The management team of heavyweight Lucas Browne will claim they have proof their fighter was clean just over a week out from his win against Ruslan Chagaev as the Australian tries to salvage his WBA belt and reputation in the face of doping charges.

Less than a month after he was the toast of the local boxing community for his breakthrough victory, the first recognised title by any Australian in the global heavyweight ranks, the 36-year-old was left shattered by news he had returned a positive urine sample containing the banned drug Clenbuterol.

The testing was done by the Las Vegas-based Voluntary Anti-Doping Association (VADA) on behalf of the BDB, Germany's boxing commission, which oversaw the bout in the Chechen capital Grozny.

Browne now has the right to demand a test of the B Sample, at his own expense, but had yet to respond to the test result late Tuesday, nor had his UK-based promoter Ricky Hatton issued a statement regarding their course of action.