is under the age of 15 when registered and has already represented another association 5 years after the date of registration, if the player is under the age of 18 but at least 15 years of age when registered 7 years after the date of registration, if the player is under the age of 21 but at least 18 years of age when registered 9 years after the date of registration, if the player is at least 21 years old when registered Notable players An official hall of fame exists at the ITTF Museum. A Grand Slam is earned by a player who wins singles crowns at the Olympic Games, World Championships, and World Cup. Jan-Ove Waldner of Sweden first completed the grand slam at 1992 Olympic Games. Deng Yaping of China is the first female recorded at the inaugural Women's World Cup in 1996. The following table presents an exhaustive list of all players to have completed a grand slam. Jean-Philippe Gatien, Wang Hao and Fan Zhendong won both the World Championships and the World Cup, but lost in the gold medal matches at the Olympics. Jörgen Persson also won the titles except the Olympic Games. Persson is one of the five table tennis players to have competed at seven Olympic Games. Ma Lin and Chen Meng won both the Olympic gold and the World Cup, but lost in the finals of the World Championships. Governance Founded in 1926, the International Table Tennis Federation (ITTF) is the worldwide governing body for table tennis, which maintains an international ranking system in addition to organizing events like the World Table Tennis Championships. In 2007, the governance for table tennis for persons with a disability was transferred from the International Paralympic Committee to the ITTF. On many continents, there is a governing body responsible for table tennis on that continent. For example, the European Table Tennis Union (ETTU) is the governing body responsible for table tennis in Europe. There are also national bodies and other local authorities responsible for the sport, such as USA Table Tennis (USATT), which is the national governing body for table tennis in the United States. Variants Hardbat table tennis uses rackets with short outward "pips" and no sponge, resulting in decreased speeds and reduced spin. World Championship of Ping Pong uses old-fashioned wooden paddles covered with sandpaper. Round the World (also called Round Robin or Round the