The boxer who effectively ended David Tua's heavyweight title quest has reportedly tested positive for a banned stimulant, prompting calls for a rematch.
Monte Barrett tested positive for the banned stimulant methylhex-anemine following a urine test after his August 13 win over the Kiwi boxer.
Despite being knocked to the mat in the last round, Barrett rose to claim a unanimous points victory over Tua.
The result has seen Tua drop in the World Boxing Organisation ratings, hindering his hopes of a title challenge.
Tua's lawyer Blair Edwards told 3News the WBO should take action.