Conor Benn is a "clean athlete", according to his father Nigel, after the 26-year-old's fight against Chris Eubank Jr was called off due to a failed drugs test.

On Wednesday, it emerged Benn had tested positive for the banned substance clomifene last month.

The British Boxing Board of Control subsequently prohibited the fight from taking place. Although promoters on both sides attempted to force a U-turn, their efforts were unsuccessful, with the fight officially postponed on Thursday.

Nigel Benn posted a video message to Instagram on Friday defending his son, calling him a "dedicated trainer" and a "clean athlete".

"As you know, we're in total shock," the former WBO middleweight and WBC super-middleweight champion said. "I've been with my son for the last 10 weeks, and the training has just gone the absolute best it could ever have been.

"He's a dedicated trainer, he leaves no stone unturned, and we'll get to the bottom of this.

"I love my son, I know he don't cut no comers. He just goes straight at it, 100 per cent.

"We'll keep you informed, we'll let you know what the next step is, but you know, he's a faithful trainer and a clean athlete. Speak to you all soon. God bless."

Nigel Benn famously twice fought Chris Eubank Sr in the 1990s, with Eubank winning the first contest and the second ending in a draw.