Tommy Fury has revealed he broke his rib in sparring which forced him to pull out of his fight with Jake Paul.
The Brit was due to take on the social media star on December 18 in Florida but has now withdrawn after suffering the injury.
Fury is also suffering from a chest infection but hopes to reschedule his bout with Paul.
And in a video posted on social media, Fury said: "Training camp couldn't have gone any better for me for the first week or two but then I contracted a bacterial chest infection which led me to go to the gym and not being able to breathe.
"My sparring sessions, pad work sessions , whatever it may be I wasn't able to breathe and I was coughing up huge amounts of phlegm all the time.
"It led me to sleepless nights and that went on for four weeks. I had the mind-set of, 'I"m going to train, I'm going to get through this, I'm going to fight no matter what'.
"Four weeks past and we decided to have a sparing session and I took a little clip to the body and because my body was so weak due to the virus, I instantly knew something wasn't right.
"I was throwing up from the pain , I was doubled over. I literally got my bag and went straight to the hospital for an MRI scan and got the results back the same day.
"The results showed I had a clean break and I had multiple fractures. For the following week I still thought I could fight but then it took the doctor and my whole team to say you cant fight.
"Even now it hasn't sunk in that I'm not fighting. My only focus is getting a new fight date set and recovering.
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"I can't do anything else apart from get my body right as quickly as possible and look for a new fight date with Jake Paul.
"There is no other fight out there, that's the fight I want next and hopefully we can work out a new date for next year."
Fury may have to wait for his shot at Paul, however, who has refused to commit to rescheduling the bout.
In the meantime, he will rematch Tyron Woodley on Saturday week, four months after outpointing the former UFC champion to record his fourth professional victory.
