defense attempts to knock away or steal the ball from the offense, or commit a foul in order to stop an offensive player from taking a shot on goal. ... To do so, the defender attempts to stay between the attacker and the goal and maintain inside water at all times
Dimensions. The playing court is 18m long and 9m wide and is surrounded by a free zone 3m wide on all sides. The space above the playing area is known as the free playing space and is a minimum of 7m high from the playing surface.
