How It Works:

Although variations of rugby have existed since the Middle Ages, the first international match, played between Scotland and England, was not documented until 1871. There are two primary variants of rugby: Union and Sevens. While Rugby Union, featuring 15 players per side, had previously been on the Olympic program four times, it is Rugby Sevens (with seven players per side) that brings the sport back to the Games.

Both the men’s and women’s tournaments begin with the 12 teams divided into three pools of four for a preliminary round robin. The top eight teams advance to the knockout stage, beginning with the quarterfinals. The semifinal winners play in the gold medal game while the semifinal losers play for bronze.

Canada's John Moonlight, right, scores the winning try in the final moments of play as France's Jean Baptiste Mazoue tries to stop him during World Rugby Sevens Series' Canada Sevens bowl final action, in Vancouver, B.C., on Sunday March 13, 2016. THE CANADIAN PRESS/Darryl Dyck

Canada’s John Moonlight scores the winning try in the final moments of play at the World Rugby Sevens Series’ in Vancouver on March 13, 2016. (CP /Darryl Dyck)

All rugby sevens matches are divided into two seven-minute halves, except the medal finals which are two 10-minute halves. The oval-shaped ball must be passed backwards between team members or kicked within the boundaries of the pitch.

The most valuable method of scoring is a try, worth five points when an attacking player puts the ball on the ground while controlling it within the dead ball area behind the goal line. After a try, a team can score two additional points by kicking the ball between the H-shaped goal posts, known as a conversion. A team can also score three points with a penalty kick through the posts or with a drop goal, by which a player drops the ball to the ground and then kicks it through the posts.

Canada (in red) at Atlanta Sevens on April 8, 2016 (Photo: World Rugby).

Canada (in red) at Atlanta Sevens on April 8, 2016 (Photo: World Rugby).

Canada’s Olympic History (Pre-Rio 2016)

Canada has never won an Olympic medal in rugby, something the country would like to change when rugby sevens makes its Olympic debut at Rio 2016.