UFC Vegas 15 has lost it’s main event just hours before the weigh-ins after Curtis Blaydes tested positive for COVID-19.

The No.2 ranked heavyweight in the world was due to fight Derrick Lewis on Saturday night, with big implications in the title picture expected for whoever the winner was.

It was revealed by ESPN’s Ariel Helwani however that the fight has been cancelled, with the hope to reschedule the bout at some point before the turn of the year.

Curtis Blaydes vs. Derrick Lewis — tomorrow night’s UFC main event — has been canceled, per multiple sources. Blaydes has tested positive for COVID.

The promotion is hoping to reschedule the fight in December, sources say, though that isn’t a done deal just yet.

— Ariel Helwani (@arielhelwani) November 27, 2020

Curtis Blaydes is on a four-fight win streak having beaten Alexander Volkov most recently, after wins against Justin Willis, Shamil Abdurakhimov and Junior Dos Santos. He called out Derrick Lewis following ‘The Black Beast’s knockout win over Aleksei Oleinik earlier this year.

It is currently unknown what the UFC plan on doing with the card for Saturday night going forward.

UPDATE:

Anthony ‘Lionheart’ Smith will now main-event UFC Vegas 15 with Devin Clark. The fight will be five rounds, after both fighters asked for it despite having only trained for three rounds. We have a main event!

Smith vs. Clark will now be a five-round main event. Clark told me UFC asked what he wanted and he said he preferred five rounds. He wants to win a title some day and sees this as a good chance to get a five round fight. https://t.co/adULYvZBUV

— Brett Okamoto (@bokamotoESPN) November 27, 2020

Anthony Smith told me when he was asked to main event, he texted Dana White directly to say he wanted it to be five rounds. Said a big part of that is for the fans, main event should be five rounds. So, both guys say they preferred five, even though they trained for three.

— Brett Okamoto (@bokamotoESPN) November 27, 2020