Roberto Martinez says Gareth Barry will be assessed following a first-half challenge in the win against Cardiff City.
The midfielder was grounded in pain before the break, but played the full 90 minutes of the 2-1 win and even assisted Seamus Coleman's late winner.
And Everton boss Martinez explained how the foul could have led to a dismissal for Kevin Theophile-Catherine.
"Gareth has stud marks on his shin," he said. "It's a strong knock but it didn't affect any joints so that's the reason he could carry on.
"I haven't seen the replay, but I believe the player has both feet off the ground and he doesn't get the ball so it was a reckless, violent challenge."
Cardiff counterpart Ole Gunnar Solskjaer raised concerns about having a late penalty appeal turned away.
And while sympathising with his opposing number, Martinez insists there were other decisions on the day and in recent weeks that could have gone Everton's way.
He added: "I believe there were a couple of difficult calls for the referee. I haven't seen the replays but there was an incident with Zaha, a possible red card for a challenge on Gareth and another incident in our box.
"If you believe we had a little bit of luck today, that balances the real bad luck we had in the previous three games. I'll check them out but they weren't easy for the referee."
"Those decisions sometimes go for you or against you - it doesn't matter where you are in the table. We had a similar incident a couple of weeks back and that's the nature of the game."
The Blues are back at Goodison on Saturday against Swansea City (3pm kick-off). Click here to buy your tickets online.