may not score a point with his open hand(s), but may score a point by fisting the ball. Damian Cullen. Running the rule. The Irish Times 18 Aug 2003, pg. 52.
Your hand is referred to as your fist when you have bent your fingers in towards the palm in order to hit someone, to make an angry gesture, or to hold something. Angry protestors with clenched fists shouted their defiance Gary clutched a penny in his fist