UFC 249 is still on schedule for April 18, with Tony Ferguson fighting Justin Gaethje for an interim lightweight title in the main event.

Although UFC President Dana White hasn’t announced a venue for his promotion’s biggest pay-per-view show of the spring, he remains determined to hold an event in less than two weeks amid the coronavirus pandemic.

The mixed martial arts promotion announced the change to UFC 249’s main event bout today. Gaethje replaces lightweight champ Khabib Nurmagomedov, who is apparently unable to leave Russia amid the pandemic.

“The fight is signed and is 100% ON LIVE on ESPN somewhere on EARTH!!!!” White tweeted today.

White has remained steadfast in his plan for the UFC to fight on while virtually all high-level sports competition has stopped.

White reportedly is attempting to secure a venue on the West Coast for the show, likely on tribal lands. Most U.S. states have restrictions in place that would make it impossible to stage a show even without an audience.

White’s quest hit another obstacle later today when the Association of Ringside Physicians issued a statement calling for the indefinite suspension of all combat sports events.

“Any combat sport taking place during this global pandemic places the athletes, officials, and anyone else involved in the event under unnecessary risk of infection and transmission of COVID-19,” ARP’s statement read. “In addition, combat sports athletes often require medical attention after a bout, and we do not wish to see any additional strain on an already overwhelmed medical system.”

To hold an event, White will have to find ringside physicians willing to work against the ARP’s recommendation. The UFC already is likely to be forced to hire its own judges and referees while serving as its own regulatory body, since most state athletic commissions will not currently allow an event to take place in their jurisdictions.

White has attempted to buck the rest of the sports world’s collective plan for handling the pandemic over the past five weeks. The UFC held a full fight card in an empty arena in Brazil last month, but was forced to cancel its ensuing three scheduled shows when not even the promotion’s native Nevada would allow it to hold fights in an empty arena.

Most UFC fighters have expressed an eagerness to fight during the pandemic. Mixed martial artists typically don’t get paid unless they fight, although Bellator and other promotions have paid fighters whose bouts were canceled by the pandemic in recent weeks.

Ferguson (25-3) is a longtime lightweight contender who has been booked to fight Nurmagomedov five times. Every single bout has fallen through due to injury or other circumstances.

Gaethje (20-2) is among the UFC’s most exciting fighters, with a heedless brawling mentality that suggests a thrilling matchup with the equally reckless Ferguson.

“I’m terrified and I … love it,” Gaethje tweeted after the announcement.

Nurmagomedov announced last week that he wasn’t planning to leave his native Dagestan, suggesting Russia’s travel restrictions made it impossible. The unbeaten champion later claimed he would be willing to leave for the fight, but couldn’t plan because he didn’t know where or when it would occur.

UFC 249 initially was slated for Barclays Center in Brooklyn.