The Ring Magazine broke the news on social media. They said Dubois is being looked at by a doctor right now. If he can't fight, the organizers will try to find someone else to face Parker.
This fight was going to be a big deal for Dubois. He became the full champion last year and has been on a roll. He beat Jarrell Miller and Filip Hrgovic. Then he shocked everyone by knocking out Anthony Joshua in the fifth round at Wembley Stadium. That win was huge for Dubois.
If Dubois can't fight, the whole match might be called off. Or Parker could end up fighting another top heavyweight instead.
This isn't the only fight on the card that's had problems. Floyd Schofield was supposed to challenge Shakur Stevenson for the WBC Lightweight World Title. But Schofield got sick too. Now Josh Padley from England will step in, but he's not expected to give Stevenson much trouble.
The main event is still on track. Artur Beterbiev and Dmitry Bivol will fight for all the light-heavyweight belts. A lot of people think this could be the best fight in boxing right now.
All of this is happening at what they're calling the "fight card of the century" in Riyadh. Turki Alalshikh and Riyadh Season put the whole thing together.
‼️ The Ring has learned that IBF heavyweight world champion Daniel Dubois is sick and is currently being evaluated by a doctor. A replacement is being pursued in the event that Dubois is unable to move forward with his defense against Joseph Parker on Saturday night.
That's what The Ring Magazine posted on Twitter earlier today. The magazine is owned by Turki Alalshikh, who's also behind this big boxing event.
We'll have to wait and see what happens with Dubois. Either way, it looks like there will be some big fights in Riyadh this weekend.