The welterweight bout between Nathan McIntosh and Louis Adolphe concluded on a controversial note, with the former being adjudged the winner at the SSE Arena, Wembley, London.
The incident happened in the opening and only round of the fight, with seconds remaining for the first round to end.
The pair were holding onto each other as the timer progressed when the referee Howard Foster intervened to separate the boxers, shouting for a break.
After the duo broke free, much to the surprise of the crowd present at the venue, as well as fans watching across the globe, without the official noticing, Adolphe spun around his rival and landed a vicious right-hook.
McIntosh’s team instantly opposed the move, screaming in the direction of the referee who was initially unaware of the turn of events.
The spectators watched in shock as the 29-year-old hit the canvas, while paramedics rushed inside the ring to attend the Nottingham boxer.
McIntosh required oxygen immediately, as Adolphe believed he had successfully maintained his unbeaten record, wildly and shamelessly celebrating around the ring after the brutal blow.
Boos and jeers echoed round the stadium after replays showed the disgraceful move from the 25-year-old, which was deemed ‘illegal’ by the ref after the revelation.
You can see the illegal punch in the video below. (Scroll to 03:38)
McIntosh managed to climb back on his feet and Foster raised the hand of the Brit, confirming the victory by disqualification.
Adolphe sarcastically clapped those in attendance and left the arena as supporters loudly voiced their dissatisfaction of the actions of the unorthodox man.
Although, circumstances did not transpire to something serious, it cannot be denied that the illegitimate punch could have led to a catastrophic outcome.
McIntosh claimed the 14th win of his pro career, while Adolphe succumbed to his first loss in eight bouts ‘till date.