Angry Preston boss Graham Westley accused Crawley counterpart Richie Barker of being disrespectful after his side's 2-1 loss.
Two goals from Gary Alexander sealed Crawley's win despite Paul Huntington's late effort, but Westley was unhappy with Barker's reaction to their victory and refused to shake his hand.
"He was screaming his mouth off - 'wahay we've won'! It was disrespectful," said Westley.
"I made that point to him. You've won and fair play. I didn't need him screaming down my throat as if he's won the World Cup.
"It was a big ground for him to come to and win, but have some manners."