Water polo in the context of "Olympic-size swimming pool"

A team sport is a type of sport where the fundamental nature of the game or sport requires the participation of multiple individuals working together as a team, and it is inherently impossible or highly impractical to execute the sport as a single-player endeavour. In team sports, the cooperative effort of team members is essential for the sport to function and achieve its objectives. The objective often involves teammates facilitating the movement of a ball or similar bob in accordance with a set of rules in order to score points. Examples are basketball, volleyball, rugby league, rugby union, water polo, handball, lacrosse, cricket, baseball, and the various forms of football and hockey. These sports emphasize teamwork, strategy, and coordination among team members while competing against opposing teams to achieve a common goal. Team sports do not include individual or individual-to-team events within a sport.

In many team sports, defense (American spelling) or defence (Commonwealth spelling) is the action of preventing an opponent from scoring. The term may also refer to the tactics involved in defense, or a sub-team whose primary responsibility is defense. Similarly, a defense player or defender is a player who is generally charged with preventing the other team's forwards from being able to bear down directly on their own team's goalkeeper or goaltender. Such positions exist in association football, ice hockey, water polo and many other sports.

The Bergvall system was a variation of the traditional knockout tournament system.

It was used at the 1912, 1920 and 1924 Summer Olympics after being devised by Erik Bergvall, a Swedish water polo player, journalist and sports official who wanted to improve on the traditional knockout method used in Olympic competitions.

The Royal Dutch Swimming Federation (Dutch: Koninklijke Nederlandse Zwem Bond, “KNZB”) is the official governing body for swimming, in the Netherlands. The federation overlooks several other sports including competition swimming, open water swimming, water polo, diving and synchronized swimming. The federation is based in Nieuwegein and affiliated with the national sports body NOC*NSF. The responsibility of the KNZB is to organize and track various events. When a new organization from one of the water sports joins the KNZB they can participate in the competitions governed by the KNZB. They will then be placed on a ranking list.

Water sports or aquatic sports are sports activities conducted on waterbodies and can be categorized according to the degree of immersion by the participants.

The World Aquatics Championships, formerly the FINA World Championships, are the World Championships for six aquatic disciplines: swimming, diving, high diving, open water swimming, artistic swimming, and water polo. The championships are staged by World Aquatics, formerly known as FINA (Fédération internationale de natation), the international federation recognised by the International Olympic Committee (IOC) for administering international competitions in water sports. The championships are World Aquatics' largest and main event traditionally held biennially every odd year, with all six of the aquatic disciplines contested every championships. Dr. Hal Henning, FINA's president from 1972 through 1976, and their first American President, was highly instrumental in starting the first World Aquatics Championships, and in retaining the number of swimming events in the Olympics, which gave an advantage to nations with larger, more balanced swim teams.

The championships were first staged in 1973 in Belgrade, Yugoslavia, with competitions held in swimming, diving, synchronised swimming and water polo. In 1991 open water swimming was added to the championships as a fifth discipline. In 2013 high diving was added to the championships as a sixth discipline. In 2017 the synchronised swimming discipline was renamed to artistic swimming.

The World Aquatics Athletes of the Year (formerly FINA Athletes of the Year) is a set of awards presented by World Aquatics (International Swimming Federation) and the FINA Aquatics World Magazine. Each recognises excellence in five categories of aquatic sports: swimming, diving, synchronized swimming, water polo and open water swimming. The award was inaugurated in 2010.

Bud Spencer (born Carlo Pedersoli; 31 October 1929 – 27 June 2016) was an Italian actor, professional swimmer and water polo player. He was known for action-comedy and spaghetti Western roles with his long-time film partner and friend Terence Hill. Spencer and Hill appeared in 18 films together.

In his youth, Bud Spencer was a successful athlete and swimmer for Gruppo Sportivo Fiamme Oro. and for Società Sportiva Lazio Nuoto. He represented Italy twice at the Summer Olympics. He obtained a law degree and registered several patents. Spencer also became a certified commercial airline and helicopter pilot, and supported and funded many children's charities, including the Spencer Scholarship Fund.