Tommy Fury’s preparations for his blockbuster performance opposite Jake Paul are being hampered by a cold.
Britain will face YouTuber to Boxer in a catchweight competition on 18 December.
But promoter Frank Warren revealed that the youngest Fury brother contracted the disease while training at Morecambe.
Warren told ifl tv: “Tommy had a little cold but hopefully he’ll be fine.
“We’re in Morcambe (on Wednesday), so hopefully we’ll know more, but he’s up for it and he wants to fight.
“He can’t wait to fight and I certainly know from Jake’s perspective that he can’t wait to fight.”
Tommy is being coached by heavyweight champion Brother Tyson for a big-money bout in Florida.
It is expected that Elder Fury will be ringside for the Paul fight next month.
Dad John reveals that his son is set to earn more cash than some world champions for a showpiece against Paul.
Both men are unbeaten in their short professional careers but will put their records on the line in an eight-round fight.
Leaked footage from Fury Camp shows the 22-year-old showing off cunning defensive skills despite his transition.
‘Problem Child’ Paul has vowed to embarrass the British boxing family as he showed his own grueling training regime.
The 24-year-old Ohio native is using neck-strengthening techniques at his camp in Puerto Rico — a move popular with the likes of Floyd Mayweather and Anthony Joshua.