A world championship(s) is the top achievement for any sport or contest. The title is usually awarded by contests, ranking systems, stature, ability, etc. This determines the best nation, team, individual (or other entity) in the world in a particular field. Certain sports do not have a world championship, instead they may organise a world cup, or they may organize both. Often, the use of the term cup or championship in this sense is just a choice of words. Some sports have multiple champions because of multiple organizations such as mixed martial arts, boxing and wrestling.

Certain sports do not have a world championships or a world cup as such, but may have one or several world champions. Professional boxing for example has several world champions at different weights, but each one of them is decided by a "title fight", not a tournament.

A full list is presented at List of world cups and world championships

In this table includes the medals in both individual and team events. In PaleGreen still active athletes.

Eric Radford (born January 27, 1985 in Balmertown, Ontario) is a Canadian pair skater. With current partner Meagan Duhamel, he is the 2012 Canadian national champion, 2011 Four Continents silver medalist and 2011 Canadian national silver medalist. He previously skated with Rachel Kirkland, with whom he was the 2006 Junior Canadian Nationals silver medalist.

Eric Radford was born and raised in Balmertown, Ontario until the age of 13 when he moved to Kenora, then later to Winnipeg, Montreal, Toronto and back to Montreal.

He teamed up with Rachel Kirkland in 2005. They were coached by Brian Orser in Toronto, Canada and part-time by Ingo Steuer in Chemnitz, Germany. They competed at the 2007 Canadian Championships where they finished 5th. After the 2009 Canadian Championships where they found themselves in a disappointing 7th place, the pair ended their relationship. He then teamed up with Anne-Marie Giroux and finished in 8th at the 2010 Canadian Championships.

At a coach's suggestion, Radford had a tryout with Meagan Duhamel and they decided to compete together. They won a silver medal at the Canadian Championships and were assigned to the Four Continents and World Championships. At Four Continents, the pair won a silver medal. During the short program at the 2011 World Championships, Radford's nose was broken when Duhamel's elbow hit him on the descent from a twist, their first element; she had opened up too early. Seeing the blood, Duhamel suggested they stop, but he decided to continue. They finished the program without a pause. Duhamel had not done a triple twist for a few years, since 2005, and the new pair began performing it before only the Canadian Championships.