This article is available to Members of The Local. Read more Membership Exclusives here.

Brazil would seem to be one of the last places in the world where a bit of nudity could cause offence, never mind create an international uproar. And yet that is exactly what happened 70 years ago when Swedish football player Sven Hjertsson dropped his drawers during a match in Rio de Janeiro, Brazil. 

Faced with a broken waistband and unwilling to depart the field and leave his team a man down during the close match with Fluminense FC, the 25-year-old defender for Malmö FF made the decision to do a quick change near his team's goalpost.

From the Swedish point of view, the brief nudity this entailed was insignificant. Based on what the Swedish players, coaches and journalists had seen on Brazilian beaches during the 1949 tournament, they clearly assumed the Brazilians would feel the same way. What happened next proved just how vastly different the two countries' views of acceptable nudity were.

“The next day, the Swedish 'Naked Shock' took up full pages in the [Brazilian] megacity's newspapers. The upper-class Fluminense… had never been involved in anything like this,” journalist Henrik Jönsson explained in a 2009 article in the Swedish newspaper Sydsvenskan.

Recommended reading for Swedish history buffs:

• The day the Soviet Union bombed Stockholm
• The Swedish farm girl who smashed records and gender barriers
• The Swedish beach that was the Ibiza of the early 1900s

In retrospect, it's difficult to say who was more shocked: the Brazilians by Hjertsson's mooning or the Swedes by the Brazilian reaction to it.

“It was a scandal! The Swedish journalists who were on the trip told us about the uproar. People went and confessed after the game. Dad thought it was ridiculous. On the beach, the Brazilians had minimal swimwear,” recalled former Swedish football player Bertil “Klumpen” Nilsson, whose father Sven Nilsson was a Malmö FF coach, in the Sydsvenskan article. “Hjertsson's white butt became the big topic of conversation when Dad came home. No one understood the Catholic double standard.”

The incident laid bare Sweden's and Brazil's different approaches to nudity. Photo: PrB/TT

In the end, Malmö FF lost the match 2-1. The team – the first from Sweden to be invited to Brazil – did not have an easy time in the tournament. The effects of a long flight, difficulty adjusting to the hot and humid climate of Brazil, and a serious bout of diarrhoea that decommissioned half the team during the first week, had all taken their toll. Champions at home in Sweden, the team nonetheless left Brazil without a win.

READ ALSO: Ten rules for getting naked in Sweden

As for the “Naked Shock”, it seemed only to burnish Hjertsson's reputation back in Sweden, and perhaps even overshadow his legacy to some extent. During his 12-year career at Malmö FF, the team won gold four times in the national championships. He also played 13 times for the Swedish national team, which was considered one of the world's greatest football teams between 1945 and 1950. In 1950, the year after the incident in Brazil, Sweden ranked third in the world ranking, ahead of Brazil in fourth place.

Hjertsson died in 1999, but the photo of him from 1949 lives on as a singular glimpse into international football seven decades ago.

Victoria Martínez is an American historical researcher, writer and author of three historical non-fiction books. She lives in Småland county, Sweden, with her Spanish husband and their two children.