Kennedy Nzechukwu, his opponent, came forward early, prompting Barnett to throw several leg kicks in the direction of the Nigerian.

Nzechukwu then fainted a spinning kick that caused the American to laugh, where he gave him a high-five during the contest.

But as the clock ticked on during the first round, Barnett, who has suffered from a recent Achilles injury, looked compromised.

One of his earlier leg kicks from the start of the fight had clearly worsened his pre-fight injury.