Steven Fletcher scored twice and Jordi Gomez once to sink Palace, who were briefly level at 1-1 courtesy of Wes Brown's own goal, but it could have worked out differently had Palace been given a penalty inside the first 30 seconds when Santiago Vergini felled Fraizer Campbell in the box.
"I think everybody knows it's a penalty, the ref (Phil Dowd) said he didn't see it, he's in a great position, Warnock told Sky Sports after the game. "We need a bit of luck, the only chance we have got of getting a penalty is someone picking the ball up and throwing it at the referee.
"It's so disappointing when you play so well, how we've lost that game I'll never know.
"It bewilders me, bookings, but don't let's talk about it. We couldn't give any more, we were brilliant. I said to them we need to make luck as we're not going to get much luck. We're at Old Trafford on Saturday and we won't get many decisions there.
"Decisions change games, major decisions, and the last couple of weeks we've had major decisions go against us. It does feel cruel, it's a cruel night. I said to the fourth official, 'How does it feel when you see you've made a mistake?' and he said, 'It hurts', so there'll be one or two people hurting tonight but no more than me or my team."
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