The Football Association is looking into the clash involving the Manchester City midfielder and if action is taken he would face a three-match ban.
The kick appeared to be missed by match officials and Hughton said: "It did go unnoticed and there was no doubt there was a slight kick out.
"There was certainly something, but whether that was enough for a red card, then that is for the referee to decide on.
"It was a minimal incident in the game, and the bigger factor was it was a good team performance by us."
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