Lamont Peterson has lodged "a comprehensive written appeal" against the WBA's decision to order a rematch against Amir Khan.
The governing body last week confirmed they wanted Peterson to defend their light-welterweight title against Khan after he defeated the Englishman in controversial circumstances in his native Washington on 10 December . But Peterson – who will keep the IBF title regardless after Khan withdrew his appeal to that governing body – is ready to fight that judgement.
A statement from Team Peterson said: "Although rumours have surfaced that we are now in negotiations for a Peterson v Khan rematch in Washington DC, at this time there are no open negotiations for this bout.
"The Peterson team's focus is on the WBAs decision mandating an immediate rematch.
"A comprehensive written appeal has been submitted to the WBA and we are confident that the WBA will overturn its decision mandating an immediate rematch and recognise Lamont Peterson as the true and final champion."