Wenger kicked a water bottle in anger and hurled his suit jacket into the away dug-out as Wigan stunned the Gunners by scoring three goals in the last 11 minutes to win 3-2 at the DW Stadium.
'It's the most disappointing result of the season,' said Wenger. 'You can't be happy with the way we conceded the goals. There was a lack of urgency and at this level you get punished.
Water torture: Wenger kicks a bottle in frustration as Arsenal collapse to a stunning late defeat
'It's difficult to understand. We were not focused and disciplined and got caught. Perhaps the players felt too much comfort but I never thought the game was over. I saw that we were having difficulty in keeping the ball and creating chances. When you don't create chances you're in trouble.
'At 2-0, our game lacked cohesion and discipline. I always said that we could be punished.'
Thrown away: Fabianksi fumbles to gift Wigan a crucial equaliser at the death
Arsenal's shock defeat means the title race has come down to a two-horse race between Chelsea and Manchester United, while Wenger is more concerned that his team hold on to third place.
'Of course if we had won the game today we would still be in the title race,' he said.
'But Tottenham and Manchester City can catch us, so we have to win at least one more game.'
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