All England Open Badminton Championships It was eventually considered – especially after the first Thomas Cup series in 1949 – the unofficial world championship of the sport until 1977, when the International Badminton Federation launched its official championships. There were two instances when it was halted – from 1915 to 1919 (due to World War I) and from 1940 to 1946 (due to World War II). The tournament has been held at eight venues, and is now played at Arena Birmingham, Birmingham. Below is the list of the most successful players in the All England Open Badminton Championships: In the modern era players are less
World Judo Championships except Oceania and Antarctica. The World Judo Championships team competition began in 1994. women's competition began in 1997, and after 1998 it was held once every four years until 2006. The competition will be held every year from 2007. Judoka who participate in the individual world championships often do not participate in the team competition. World Judo Championships The World Judo Championships are the highest level of international judo competition, along with the Olympic judo competition. The championships are held once every year (except the years when the Olympics take place) by the International Judo Federation, and qualified judoka compete