What provoked Zinedine Zidane so much?

Eli Stephens' blog tackles the Zinedine Zidane incident during the World Cup Final and refers his readers to an article on French soccer and racism by Dave Zirin. (Go check it out, it's good).

So it's worthwhile noting this quote from the piece as we wait to hear what was actually said to provoke Zidane so much:

There is no place for racism. It is impossible to love this sport, to play it, or to support a team and be racist or xenophobic at the same time. The values conveyed by football are the exact opposite of racism. Because racism promotes exclusion and hate. Football, in contrast, brings people together to share a common pleasure. Every four years we experience a unique time in which people congregate together, take part together and celebrate together. Racists are not invited."

- Zinedine Zidane, France's legendary player who was awarded the "Golden Ball" as player of the tournament, but who was red-carded (thrown out of the game) in the second overtime period for a vicious head butt on an Italian player.