Two UFC 313 bouts are off due to fight day illnesses. The heavyweight bout between perennial contender Curtis Blaydes and debutant Rizvan Kuniev, as well as the featherweight bout between John Castaneda and Chris Gutierrez have been canceled hours prior to the start of the event.

The UFC 313 fight card has suffered another hit just hours before the pay-per-view card. Promotional officials announced on Saturday that Curtis Blaydes suffered an illness, and his featured preliminary bout with Rizvan Kuniev is cancelled.

Tonight's UFC 313 event is down to a total of 10 fights, this after two bouts were canceled at the last minute.

After John Castañeda was confirmed to be out of his early prelim with Chris Gutierrez, illness also struck a more high-profile matchup, with former interim heavyweight title challenger Curtis Blaydes withdrawing from UFC 313’s featured prelim opposite newcomer Rizvan Kuniev.

The featured prelim of UFC 313 which feature one of the best heavyweights in the promotion welcoming a promotional newcomer.

UFC 313 has lost two fights just hours before the start of the event because of illnesses.Curtis Blaydes withdrew from his heavyweight bout against Rizvan Kuniev and John Castaneda was forced out of his featherweight tilt with Chris Gutierrez,

Apparently no fight is safe at UFC 313. Just a few hours before the action kicks off in Las Vegas for the promotion's third pay-per-view event of the year, the UFC announced some last-minute changes for what was supposed to be a 12-fight card.

Ask and you shall receive! Reigning UFC light heavyweight champion, Alex Pereira, is perhaps one fight away from clearing out the 205-pound division. But, his remaining obstacle may prove to be his toughest test to date in the former of hard-hitting Dagestani bruiser Magomed Ankalaev!