Fulham boss Chris Coleman said two controversial refereeing decisions were decisive in the 3-0 defeat to Arsenal.
Mark Halsey changed his mind about awarding the hosts a penalty before disallowing a Collins John goal.
Coleman said: "The referee got it all wrong - we should have gone in at half-time at least 1-0 up, if not 2-0.
"Against Arsenal, you've got to be on top of your game and we were but we were playing with a referee making poor decisions - match deciding decisions."
Coleman said he was approached by Halsey at half-time.
"He said to me - 'I got that wrong'," said Coleman.
"I'm not really sure if he was talking about the penalty or the disallowed goal - but he got them both wrong but at least he's man enough to come and say something."
Arsenal went on to score three times in the second half to condemn Fulham to their third straight defeat but Coleman remains positive.
"When they scored our heads dropped but I can't blame my players for that," he said.
"They gave everything today and took the game to Arsenal. They were immense but they were hard done by today.
"But I'll make sure the players don't feel sorry for themselves.
"We've got to show the same commitment and attitude as we showed today in our next game against West Brom and we'll give them one hell of a game."