Kleydson Rodrigues will have to forfeit a large chunk of his purse after failing to miss weight at the UFC 284 official weigh-ins on Saturday.
The Brazilian is set to face Australian fighter Shannon Ross in a bantamweight match in the early prelims at RAC Arena in Perth.
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Rodrigues weighed in 0.9kg over the bantamweight limit, weighing in at 57.6kg.
The fight will still go ahead, but Rodrigues will have to forfeit 20 per cent of his fight purse.
The bantamweight fighter will also have to forfeit a similar percentage if he wins any fight bonuses.
Russian fighter Zubaira Tukhugov also missed weight, coming in at 1.4 kg over lightweight.
His fight will also go ahead with Elves Brenner, but Tukhugov will be deducted 20 per cent of his fight purse.
See the full list of official UFC 284 weights below
Both championship bouts on the card have been made official with no weight issues.
UFC 284 headliners Alexander Volkanovski and Islam Makhachev have both made weight ahead of their lightweight championship bout.
However, there was a sizeable difference in the way they weighed in, with Volkanovski, who is going up a division, coming in with ease at 70.08kg. Makhachev had to use the weigh-in curtain to make 70.3kg.
In the co-main event, both fighters vying for the interim title belt made weight.
Yair Rodríguez and Josh Emmett both weighed in at 65.8kg.
Islam Makhachev (70.3kg) vs Alexander Volkanovski (70.08) (lightweight title bout)
Yair Rodríguez (65.8kg) vs Josh Emmett (65.8kg) (interim featherweight title)
Jack Della Maddalena (77.5kg) vs Randy Brown (77.5kg)
Justin Tafa (120.6kg) vs Parker Porter (119.7kg)
Jimmy Crute (92.75kg) vs Alonzo Menifield (93.4kg)
Tyson Pedro (93.4kg) vs Modestas Bukauskas (93.4kg)
Joshua Culibao (66.2kg) vs Melsik Baghdasaryan (66.2kg)
Shannon Ross (56.9kg) vs Kleydson Rodrigues (57.6kg)
Jamie Mullarkey (70.3kg) vs Francisco Prado (70.08kg)
Jack Jenkins (65.9kg) vs Don Shainis (66.2kg)
Loma Lookboonmee (52.38kg) vs Elise Reed (52.38kg)
Shane Young (65.9kg) vs Blake Bilder (66.2kg)
Zubaira Tukhugov (71.4kg) vs Elves Brenner (70.5kg)
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