Soccer, football, however you want to say it, is a passionate sport.
There's passion on the field as players know the significance of what's at stake; there's passion off the field as fans desperately want their team to win.
Passion is one of the things that makes the sport beautiful.
Yet sometimes, that same passion can overflow and manifest itself in ways that aren't positive. Basically, passion can cause fights.
Players, supporters, even coaches, can cause fights.
Here's the ten best on and off-field brawls in soccer history.