Arsene Wenger was left "disgusted" by a controversial offside decision which could yet prove crucial in Arsenal's Barclays Premier League title battle following a goalless draw with Sunderland at Emirates Stadium.
Andrey Arshavin should have been given a penalty after being pushed by Titus Bramble as he shaped to shoot, and then had a goal incorrectly ruled out for offside by the assistant on the far side after bursting clear.
"I am too disgusted to speak about these things," the Arsenal manager told BBC Sport. "What can you say? We put a lot of commitment into the game. I believe Arshavin was not offside, but what can you do?"
He added: "These kind of things have too big an impact on the Premier League and we are really disappointed but we have to take it on the chin for the next game, but we feel really justice has not been done today and it is not the first time."
When he gave his main post-match interview, the Gunners boss was in more reflective mood.
He told reporters: "It is another disappointment.
"You do not want to have things going against you, but what can we do? Now we just have to focus on Tuesday night."
Wenger continued: "I am very happy with the performance, defensively we were very good and gave a lot physically, and I cannot fault the players' attitude.
"True, we lacked a bit of creativity and sharpness in final third, but had two decisions going against us today which punish us severely, especially the offside, which is not offside.
"To win this game 1-0 today was important."