Macy Chiasson has missed weight by one-and-a-half-pounds for her bantamweight clash with Yana Santos.

The pair weighed in on Friday morning to make their UFC 320 bout official ahead of the huge Las Vegas card this weekend .

Every single fighter, including UFC champions Magomed Ankalaev and Merab Dvalishvili , and title challengers Alex Pereira and Cory Sandhagen , all made weight at UFC Apex apart from Chiasson.

Chiasson tipped the scales at 137.5lbs (62kg), meaning she missed the 136lbs (61kg) bantamweight limit.

Her fight with Santos will still go ahead as planned, but Chiasson forfeits a whopping 25 per cent of her fight night purse to her opponent for missing weight.

It was the second time the 34-year-old American missed weight in her UFC career, and members of the M

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