Barcelona striker Luis Suarez has vowed to never resort to biting an opponent again.

The Uruguay international received a four-month ban for sinking his teeth into Italy defender Giorgio Chiellini during the World Cup, the third time such an incident has occurred during his career.

Suarez, who is expected to make his Barca debut against Real Madrid later today, said that he has been given the help he needs to overcome his behaviour problems.

"I believe I am on the right path now, dealing with the people who can help me, the right kind of people," he told The Guardian.

"It is like an impulse, like a reaction. Everyone has different ways of defending themselves. In my case, the pressure and tension came out in that way.

"There are other players who react by breaking someone's leg, or smashing someone's nose across their face. What happened with Chiellini is seen as worse. I understand why biting is seen so badly."

Barcelona travel to Real Madrid to take on their bitter rivals at 5pm today.