Crystal Palace boss Ian Holloway was left fuming at the referee after the 2-1 Championship defeat at Leeds United.
With the scores all level, Wilfried Zaha went down in the Leeds penalty area under a challenge from Sam Byram.
The referee waved away the England international's appeals and Leeds went on to end Palace's 14-match unbeaten run.
Holloway said: "If the referee thinks Wilf has dived, he has to book him. If he thinks he has been fouled, it had to be a penalty. But he has done neither.
"But you have to give Leeds credit. They looked like the Leeds of old in the first 20 minutes by coming at us.
"We came through that period but didn't get the breaks. I thought we deserved at least a point and we did our supporters proud."
He added: "Leeds got on the end of two things inside our box and scored two goals but there was a real scramble at the end and how the referee awarded Leeds a free-kick to relieve the pressure I don't know.
"The crowd got them that free-kick."
Luciano Becchio and Paul Green had Leeds United 2-0 ahead before Peter Ramage pulled one back.
Palace, who have been replaced at the top the Championship by Cardiff, travel to Hull City tomorrow night.