Wigan boss Roberto Martinez claimed his players felt Aston Villa striker Emile Heskey should have been red carded for his reaction towards referee Mike Jones during the 1-1 draw.
Heskey was incensed at being denied a free-kick after being on the receiving end of a challenge from Wigan defender Antolin Alcaraz. He made contact with the Cheshire official but escaped with a yellow card.
Martinez said: "I didn't see the incident but the players are adamant his reaction was out of order and it should have been a red card. I know Emile really well. He is a true pro, a fantastic player, and he showed the passion that he brings with football.
"Unfortunately in those moments, if you don't keep your cool, you can get a red card. At the moment decisions don't seem to be happening for us. It would have been a key moment in the game."
Martinez added: "I am happy with the performance. We are in a position where we are fighting for our lives. It was a good point against Everton and I'm pleased with the test we came through."