Fury Sr is concerned for his sonCredit: Skill Challenge Entertainment

The huge bout follows on from Fury’s poor performance against Francis Ngannou in October.

The Gypsy King was floored by the MMA star making his boxing debut and only won by contentious split decision.

Fury Sr made some strong remarks in the aftermath, and has now told Seconds Out: “I never said my son was in decline because he’s not.

“It’s the people around him who ain’t up to much. His training’s in decline and his camp’s in a bigger decline.

“It’s not a camp, it’s a circus.”

Fury Sr continued: “I was shocked at what I saw.

“I knew he wasn’t right when I put my eyes on him, when I got off the plane.

“I hadn’t seen him, I’d been in camp with Tommy [for the KSI fight].

Fury vs Usyk is set for February 17Credit: Top Rank

“I saw him in the gym in Saudi, watched him spar three or four rounds with a couple of kids – I knew then it was gonna be a hard night’s work.

“I thought, ‘What have you been doing?’ I was alarmed, I still am.

“Unless you’re gonna get the eye of the tiger back and go back to the old ways and get the hunger back – sweat, blood, s*** and tears.

“Because Usyk’s doing that – sweat, blood, s*** and tears.

“And he’s got disciplined, professional, great people around him, and I don’t think Tyson has that. I really don’t.”

Asked if he’s concerned his son could lead to his son’s first pro defeat: “Absolutely, if he doesn’t make any adjustments, it well could be.”