Aggression is a feeling of hostility that arouses thoughts of attack, deliberately unfriendly behaviour or a disposition to behave aggressively. There are three types of behaviour:

· Assertive Play

· Instrumental Aggression

· Hostile Aggression

Assertive play is having no intent to harm, a legitimate force within the rules with unusual effort and energy. An example of this could be during a tennis match. A performer could be seen to perform an aggressive shot or serve to win a point. They may have no intent to harm or injure their opponent, but merely try and win the point so they are one step closer to winning the match. It is sometimes called channelled aggression. Instrumental aggression is having no anger but with the intent to harm, their goal is to win and uses the tactic `dirty play'. This is illegal in all sports except boxing. An example of this would be...