"Nathan has admitted he raised his hand as he tried to run into the channel," the Forest boss said after the match.
"The defender, as defenders do, tried to block him. The linesman saw it so there were no complaints.
"I don't think he swung an elbow, he just ran with a raised arm.
"We sat scratching our heads wondering how we lost after our domination in the first half.
"The way we played will win us games.''