The clause that could see Anthony Mundine hit with a multimillion-dollar fine ...

Boxer Anthony Mundine faces a hefty fine if he tips the scales over the weight limit in the lead-up to his much-anticipated showdown with Jeff Horn. 

Both fighters have agreed to weigh in at 71kg or under, 24 hours before the fight and 75kg or under an hour before the bout scheduled to take place at Brisbane's Suncorp Stadium in November, The Daily Telegraph reports.

Following lengthy negotiations, it's understood Mundine, 43, will fork out $50,000 to the former WBO welterweight title holder Horn, 30, for every 100g he's above the contracted weight.

The much-anticipated showdown between Jeff Horn (pictured) and Anthony Mundine is expected to take place later this year

The much-anticipated showdown between Jeff Horn (pictured) and Anthony Mundine is expected to take place later this year

It means a minimum $1million payout to Horn if Mundine is two kilograms over the limit.

Mundine's advisor Emaid Dib described the clause as 'a lot of money for the weight of a Big Mac.'

But Horn's manager Glenn Rushton told the publication that they have given ground over

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