Arsenal manager Arsene Wenger was left frustrated after the Gunners slipped to a 1-0 defeat to Stoke City at the Bet365 Stadium on Saturday.
A solitary goal by Jese Rodriguez did the damage although Arsenal will feel hard done by after Alexandre Lacazette saw a goal ruled out for offside.
Speaking after the game, Wenger felt the goal should have stood, despite television replays suggesting the striker was very marginally ahead of the play.
“I believe it is the kind of night where you are angry,” he told Sky Sports.
“That is because not only did we not score with the number of chances we had, we made stupid mistakes centrally for the goal, first by losing the ball and after by not defending properly.
“And on top of that as well I think we were unlucky with some decisions from the referee because we scored a regular goal.”
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When pressed further Wenger was adamant Lacazette did nothing wrong, adding: “100 per cent. I just watched it and it is not offside at all. Even his foot was not offside.”
The Arsenal boss was also upset that Hector Bellerin was not awarded a penalty after going down after a challenge with Mame Diouf.
“Yes, of course, but we know we don’t get penalties,” he added.
“Look at the numbers and you will see. We had last year the highest [number of] penalties against us at home by a mile and the lowest number for us. So I give you just the numbers. I don’t say anything else.”
Saturday’s result was a poor one for Arsenal who must now respond next time out against Liverpool.