Water polo is a very tight contact game. At the same time, two teams play at the field. Each team must consist of seven players, one of which is the goalkeeper.
The game consists of four periods. The duration of each period is 8 minutes of net time. With all the signals about stopping the game, the control stopwatch should be stopped before the ball enters the game. The stopwatch should be switched on again when the player pulls off the ball from the player's hand, which holds the corresponding throw or when the player touches the ball during the controversial throw.