According to The Daily Telegraph, former world champion Anthony Mundine faces a hefty fine if he fails to make weight for his much-anticipated showdown with Jeff Horn.

Both fighters have agreed to weigh in at 71kg [156.5-pounds] or under, 24 hours before the fight and 75kg [165.3-pounds] or under an hour before the bout was scheduled to take place at Brisbane's Suncorp Stadium in November.

The paper reports that Mundine will fork out $50,000 for every 100g he's above the contracted weight.

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

The two sides were fighting over the weight, but Horn's manager Glenn Rushton told the paper that they finally agreed to meet Mundine's weight demand.

"He agreed to that weight (70kg) but then changed the goalposts and said he wanted 71kg," Rushton said to the paper.

"So to make the fight happen we said `yes'. When someone baulks at penalties it makes me think that they want to break the rules."

Horn has fought no higher than 151-pounds, while Mundine has fought as high as 175 and held a world title at the super middleweight limit of 168.

Last month, Mundine promised to batter Horn real bad in the fight.

"This boy is going to get hurt, you better have the paramedics there, you better have the ambulance at ring side because I'm telling you, it might end early,' Mundine told 7 News Brisbane.

"I'm going to hit him with that many lefts, he'll be begging for a right."

Horn (18-1-1, 12 KOs) rose to fame in July of 2017, when he scored a big upset by winning a controversial twelve round unanimous decision over Manny Pacquiao to capture the WBO welterweight title.

After making a voluntary defense, Horn lost the title in June when he was stopped by mandatory challenger Terence Crawford.