Alan Pardew struggled to contain his anger at Callum McManaman's "awful" tackle on Massadio Haidara in Newcastle's 2-1 defeat at Wigan.
Latics forward McManaman, on his first Premier League start, caused outrage with a reckless knee-high challenge on Haidara, who was reported to be in too much pain to have the injury assessed after the game.
The Newcastle boss later revealed that referee Mark Halsey, who did not even book McManaman, had apologised at half-time for missing the challenge.
Pardew's annoyance was compounded in the final minute when Arouna Kone slotted in the winner after a goalmouth scramble, with the Newcastle players all appealing for handball on Maynor Figueroa.
"It is an awful challenge. The pictures speak for themselves," said Pardew. "I thought it was a bad challenge and I was 60 yards from the incident.
"The players knew because they were on top of it and there was a lot of bad feeling about that incident when it goes unpunished. He (Halsey) said 'If I've mi...