Rio 2016 Olympics football: Brazil in search to win their first gold medal at home.

Football made its Olympics debut at the 1900 Paris Games, as a demonstration sport. A British team, Upton Park, beat a French side in the final, with Belgium – fielding players from the Université libre de Bruxelles – finishing third. However, while the IoC consider this tournament official, Fifa refuse to recognise it as there were only demonstration games between club sides.

The same happened in 1904 at St Louis, so according to Fifa the first official Olympic football tournament took place at the London games of 1908.

Six teams played in that tournament – Great Britain, two from France and one each from Sweden, the Netherlands and Denmark – and the hosts won the gold medal ahead of Denmark and the Netherlands. Men have since contested 25 more times in the Olympic Games, with the exception of Los Angeles 1932.

Hungary and Great Britan top the rankings – including the 1900 and 1904 tournaments – of gold medals with three each, while the former have also won one silver and one bronze in the process.

Brazil, meanwhile, also have five medals but have surprisingly never won a gold despite reaching the final three times, including in London 2012 where they lost the final to Mexico.

Meanwhile, the women had to wait almost a century to compete in an Olympic Games, with the game opening up for females in Atlanta 1996. They have since played five times, with United States towering above the rest of the countries, having won four gold medals and only losing to Norway in the final of Sydney 2000.

Rules

The rules of the men's tournament are quite similar to those of any major Fifa tournament. However in the Olympic Games most competitors must be under 23, with each squad allowed to have three 'over-age' players. Meanwhile, the women have no age restrictions.

Teams play games divided in two halves of 45 minutes each. During the knockout stage, if the game ends in a draw the referee will sanction 30-minute of extra time. Should it still be a draw, a penalty shoot-out of five kicks each will determine the winner. However, if after the five penalties the tie continues the teams will continue in a sudden-death scenario.

Format

There are two events in the tournament - men and women. In the men's tournament there are 16 teams divided into four groups. Eight teams, the top two of each group, go through to the knockout stage.

The following 16 teams will contest the tournament:

• Group A: Brazil, South Africa, Iraq and Denmark
• Group B: Colombia, Japan, Nigeria and Sweden
• Group C: Fiji, Germany, Korea Republic and Mexico
• Group D: Algeria, Argentina, Honduras and Portugal
• Meanwhile, in the women's competition, there are only 12 teams divided into 3 groups. In this scenario the two best teams of the group advance automatically to the quarter-final, but will be joined by two best third-placed sides. The teams are as follows:
  • Group E: Brazil, China, South Africa and Sweden.
  • Group F: Australia, Canada, Germany and Zimbabwe
  • Group G: Colombia, France, New Zealand and USA.'

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