khamzat chimaevmisses weight by 7.5 poundsahead of nate diaz Fight #khamzatchimaev #khamzat #news

khamzat chimaevmisses weight by 7.5 poundsahead of nate diaz Fight #khamzatchimaev.

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Khamzat Chimaev just stepped on the scale during weigh-ins ... and the UFC star weighed a whopping 7.5 pounds over the 171-pound limit -- putting his highly anticipated fight with Nate Diaz in jeopardy.

Diaz and Chimaev are the main event at UFC 279 -- where they're fighting at welterweight (170 pounds) -- but when it came time for the 28-year-old undefeated fighter to get on the scale, he clocked in at 178.5 pounds.

It didn't seem like Khamzat was upset or remorseful, either ... he flipped the middle finger up as he was about to step off the scale.

He also Tweeted an altered image with training partner Darren Till.

FYI, during non-title fights, the UFC allows fighters to be one pound overweight ... meaning Khamzat could've made weight weighing 171 pounds. But, he wasn't even close.

In fact, 178.5 pounds puts Chimaev closer to the Middleweight division (185 pounds) ... where he has also previously fought.

Nate weighed in at 171 pounds.

Now, the question is, what happens to the fight?? There's a chance the bout could be scrapped ... or, Khamzat will be forced to give up a healthy chunk of his fight check to Diaz.

Story developing ...