The Newcastle defender was sent off in Sundayâ€™s 1-1 draw at Anfield for a wild lunge at Luis Suarez, which Sky TV pundit Chris Coleman later claimed was a â€ścowardâ€™s challengeâ€ť.
He said: â€śFor me it was not a red card, but that is up to the referee. My conscience is clear.
â€śI donâ€™t understand the attacks I have received after that tackle. During all my years in England I have seen harder tackles than that.
â€śI have never been a violent footballer but football is a contact sport and sometimes itâ€™s difficult to stop your actions. I did not want to hurt Suarez but to stop a dangerous play against my team.
â€śI will always defend the Newcastle shirt.â€ť