Necessity of the defence: The case of R V Barnes (2004) sets out the criteria of whether an assault was committed during a sports match was criminal. The court said that in deciding whether conduct in the course of a sport is criminal or not, the following factors need to be considered; Intentional infliction of injury will always be criminal For reckless intention of injury, did the injury occur during actual play, or in a moment of temper or over-excitement when play had ceased? “Off the ball” injuries are more likely to be criminal.