Newcastle manager Alan Pardew has slammed Wigan midfielder Callum McManaman for an 'awful' challenge on Massadio Haidara.
The tackle occurred during the first half of Newcastle's 2-1 defeat at the DW Stadium on Sunday, as the 21-year-old caught the left-back on the knee with his studs raised in the air.
Referee Mark Halsey did not see the incident, and McManaman escaped sanction.
"I'm disappointed for our team and Wigan in a way," Pardew told Sky Sports. "It was disappointing the way it was conducted.
"The tackle was awful and I've lost the game in the last minute to what I think is a handball and also I've got a boy going to hospital.
"It's not going to be good because the tackle was so bad. That's the truth of it."
Pardew revealed he went to see Halsey at half time.
"He (Halsey) apologised to say that he missed it," the Englishman said.
The Newcastle boss also felt Arouna Kone's winner should have been ruled out due to a handball by a Wigan player in the build-up, and says that both the referee and the linesman should have spotted the infringement.
When asked if the assistant should have seen the incident, he said: "Yes. I also feel that you could tell by the players reactions because we all appealed as soon as it hit his hand.
"In that split second our clearance wasn't clear because we reacted. It tells it all as a referee, you should know that there's a handball there.
"We saw two teams who were really committed there and in all honesty it's difficult to take and talk about at this stage.
"What I will say is that my team has put in an honest performance and they are very unlucky to come away with nothing."
Wigan counterpart leapt to the defence of McManaman, saying the youngster was not a malicious player and that he had no intention of causing injury.
"Remember it's Callum's full debut in the Premier League. I haven't seen the replay, I believe that he touches the ball and then it's a bad challenge, but it's nothing malicious, he's not that sort of boy," Martinez said.
"It's the normal enthusiasm that you get in your debut.
"I can't really comment too much because I haven't seen the action but I can guarantee that Callum McManaman is a young man full of talent and in his debut probably showed the enthusiasm that you expect, but he's not a malicious player."
Martinez added: "I think he wants to contact the player. I don't know if he's done it already but he will do that because when you get an injury in that manner you obviously don't want to leave any bad feelings.
"If Callum hasn't apologised yet then he definitely will do that because we're a football club where those values are very important."