ST. LOUIS – Here we go again.

The co-main event of the UFC’s first event of 2018 has been scrapped the day before the card. Middleweight Uriah Hall (13-8 MMA, 6-6 UFC) did not weigh in today for his co-feature with Vitor Belfort (26-13 MMA, 15-10 UFC).

UFC broadcaster Brendan Fitzgerald announced after the close of the official weigh-ins’ two-hour window that Hall could not step on the scale, and the fight with Belfort was off.

The meeting was set to be Belfort’s retirement fight, and it remains to be seen if he’ll stay active to fight one more time before hanging up the gloves, or if he’ll stick to his timeframe and call it quits now, just without the final fight he was expecting.

UFC Fight Night 124 takes place Sunday at Scottrade Center in St. Louis and is the promotion’s first trip to the city. The card airs on FS1 following early prelims on UFC Fight Pass.

Earlier this week, Hall told MMAjunkie his “body shut down” during training camp for the fight with Belfort. He also had to deal with the death of one of his coaches, Robert Follis.

“Then prior to that, I was sick for three weeks,” Hall said. “I was breaking. I called my sister. I pretty much cried every night. I called my sister and said, ‘I can’t do this. What do I do?’ I called my mom. My mom’s like, ‘You’ve got to embrace it. It’s happening.'”

Hall in September rallied to win with a TKO over Krzysztof Jotko at UFC Fight Night 116 in Pittsburgh to snap a three-fight losing skid. Prior to the bonus-winning KO of Jotko, Hall dropped a decision to Robert Whittaker, then lost back-to-back TKOs to Derek Brunson and Gegard Mousasi. The Mousasi loss was a rematch from 14 months prior, when Hall stunned the Dutchman with a flying knee for a TKO in Japan.

In Belfort’s most recent fight in June, he scored a unanimous-decision win over Nate Marquardt at UFC 212. It was his first victory since November 2015, when he knocked out Dan Henderson at UFC Fight Night 77. Prior to the win over Marquardt, the 40-year-old Brazilian legend had lost four of five fights by TKO to Chris Weidman in a title fight at UFC 187, Ronaldo Souza, Gegard Mousasi and Kelvin Gastelum. But the Gastelum win was flipped to a no-contest after Gastelum tested positive for marijuana.

For more on this story as it develops, stay tuned to MMAjunkie.com.

UPDATE:

For more on UFC Fight Night 124, check out the UFC Rumors section of the site.