Conor McGregor had already "given up on the fight" by the time he was knocked out by Dustin Poirier, according to prominent mixed martial arts trainer Firas Zahabi.
Irish superstar McGregor, 32, suffered the first knockout of his career as Poirier, 32, unleashed a flurry of punches in the second round of UFC 257's main event.
The former two-weight world champion had a strong first round but his usually-lethal left hand failed to make an impression on his American opponent.
Zahabi - a renowned instructor who trained MMA legend Georges St-Pierre - accused McGregor of losing heart when he saw his punches were having little effect on Poirier. "In the second round, when McGregor was getting hit along the fence.
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