Palmer was left with stud marks on his knee after a reckless tackle by Martinez who escaped with just a yellow card following a VAR review. Palmer will this week undergo a scan on his left knee.
Maresca spoke after the game about how Martinez should have been sent off for a "clear red" and how the refereeing decision was way off the mark.
“It’s quite clear for all of us but the referee is there to make a decision and he took a different decision,” said Maresca, who confronted the match officials after the full-time whistle.
“I said, for me, when there’s no intention to go for the ball and you go for the player, it’s a red. When there is no intention to go for the ball, and you go for the player, for the legs, there is no doubt about the decision. It’s quite clear it’s a red.”