There was Zinedine Zidane's headbutt against Marco Materazzi ... What actually is a red card in football? Picture this: The tension is palpable as two teams battle it out on the pitch.

Zidane was shown a straight red card for the attack 20 minutes into ... who has now retired from football, or whether they would be calling on Materazzi to explain what he had said to the Frenchman.

Zidane headbutted Materazzi. When you see the video you will not believe me,” he responded. Millions of football fans around ... Five players have received red cards in a World Cup final ...

Henry claims he has yet to talk to Zidane about the incident, but feels the world should remember the great footballer rather than focus on the red card in Berlin. "The only thing I can say to him ...