Former world heavyweight champion Tyson Fury has challenged WBA Super and IBF king Anthony Joshua to a rowing race for charity.

Fury (25-0, 18 KOs) is on the verge of making a comeback following a two-and-a-half-year hiatus from boxing and with Joshua (20-0, 20 KOs) his primary target, the pair have been trading insults on social media for some time.

Joshua has previously referred to Fury as "fat", but the self-proclaimed 'Gypsy King' is confident he'll emerge victorious should the pair compete in the gym.

"I challenge AJ, Anthony Joshua, as a sporting challenge for charity of our choices, £1000 sterling the winner of a 2000m Concept 2 rowing challenge. Winner takes all for their choice of charity.

"I would say I'm a better athlete than you, Anthony, and I'm willing to prove it. 2000m, which is the usual distance for a race. Ye and me. One on one. Sport Relief 2018.

"The challenge is out there. The ball's in your court. If you decide to take it, good on you."

Fury, 29, has not fought since November 2015 when he ended the 11-year reign of heavyweight legend Wladimir Klitschko.