The objective of this group is to perform the selection by the player’s positions and to continue with the work on the basic elements of the water polo technique, and on the tactics directly affecting the efficiency of the game (coverage, stealing of the ball, block start block, counterattack, shot, realization of the power play). Attention should be paid to the improvements in biological and physiological development that have emerged from the effects of training, which is particularly important in the development of children and young people. In this way, normally considering the performance score and other observations, the mistakes in selecting players can be reduced to a minimum, because we will not neglect prospective children of a currently weaker biological and physiological development. Indeed, they are the ones we have to count on the most. The profile of the top water polo player is a result of a mutual action of inherited characteristics and changes in the structure of bodies obtained through the transformation processes of dryland and water training, and functional capabilities of individual organic systems. Requirements in the game determine the required height and weight, strong bone muscle build and the certain volume of the body. Almost all musculature is involved in the game, and various explosive movements (start, change in direction of movement, jumps out of water) condition the release of large amounts of anaerobic energy. Continuous motor activity in water is conditioned by the development of repetitive strength, especially the shoulders and the hips. The duration of the match with the stationary and movement time in water requires expressive endurance (aerobic energy). The ability to quickly find the solution in the game requires highly developed coordination because the tasks in the water are solved by the activity with all four extremities and the whole body. Scoring a goal, or passing a ball, points to precision as the ability to have a major impact on the success in the water polo game. Functional abilities of a water polo player include developed anaerobic capacity and an efficient oxygen transport system. Due to the specificity of the media, the player’s ability to observe during a game (above water, water level, underwater) also needs to be expressed, and due to the player’s personality, the efficiency of the control system and defense response is important. The more accurate recognition of the aforementioned abilities and their development by the training process increases the likelihood of success in water polo.