John Frederik Mikaelsson (December 6, 1913 – June 16, 1987) was a Swedish

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 athlete who mainly competed in the 10 kilometer walk.

He competed for Sweden at the 1948 Summer Olympics

1948 Summer Olympics

The 1948 Summer Olympics, officially known as the Games of the XIV Olympiad, were an international multi-sport event which was held in London, England, United Kingdom. After a 12-year hiatus because of World War II, these were the first Summer Olympics since the 1936 Games in Berlin...

 held in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

, Great Britain

Great Britain

Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...

 where he won the gold medal in the men's 10 kilometer walk leading to a Swedish sweep of the gold medals in race walking after John Ljunggren

John Ljunggren

John Arthur Ljunggren was a Swedish athlete who competed mainly in the 50 kilometer walk.Ljunggren first appeared in the Olympics in the 1948 Games held in postwar London...

 won the 50 kilometre.

At the 1952 Summer Olympics

1952 Summer Olympics

The 1952 Summer Olympics, officially known as the Games of the XV Olympiad, were an international multi-sport event held in Helsinki, Finland in 1952. Helsinki had been earlier given the 1940 Summer Olympics, which were cancelled due to World War II...

 held in Helsinki

Helsinki

Helsinki is the capital and largest city in Finland. It is in the region of Uusimaa, located in southern Finland, on the shore of the Gulf of Finland, an arm of the Baltic Sea. The population of the city of Helsinki is , making it by far the most populous municipality in Finland. Helsinki is...

, Finland

Finland

Finland , officially the Republic of Finland, is a Nordic country situated in the Fennoscandian region of Northern Europe. It is bordered by Sweden in the west, Norway in the north and Russia in the east, while Estonia lies to its south across the Gulf of Finland.Around 5.4 million people reside...

he managed his own double by winning his second and the last 10 kilometre walk in the Olympics before it became the 20 kilometre walk four years later.