A lingering illness for Ray Borg has scrapped the UFC 215 main event.

Borg was scheduled to challenge Demetrious Johnson Saturday night for the flyweight title, but doctors ruled him out for the bout. Amanda Nunes-Valentina Shevchenko for the female bantamweight title now serves as the main event.

Johnson (26-2-1) was looking to make history in Edmonton with a win, as he would have surpassed Anderson Silva’s record for consecutive title defenses. Reports are that the bout could be re-scheduled for as early as UFC 216.

Borg (11-2) has won five of seven UFC fights, but also previously pulled out of a bout on short notice.

Below is a statement from the UFC:

Due to a viral illness to UFC flyweight contender Ray Borg, the main event bout against champion Demetrious Johnson at UFC 215 has been cancelled. Borg was deemed unfit to compete by the UFC medical team.

UFC 215, which is now headlined by the women’s bantamweight championship between Amanda Nunes and Valentina Shevchenko, will proceed as scheduled with 11 bouts at Rogers Place in Edmonton, Canada. Moving to the Pay-Per-View main card will be the flyweight bout between Henry Cejudo and Wilson Reis. Additionally, the Mitch Clarke and Alex White lightweight contest will now kick off the FS1 prelims.

With the removal of Johnson vs. Borg, customers may request a full refund of purchased tickets at point of sale.