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Teams consist of two players who play over best of three sets. Types of shots include an ace, a bump pass, a dig, a spike, a dink and block.

Teams consist of six athletes playing the best of five sets. A player called the 'Libero' may substitute into the back court for any player.

Athletes must swim 1.5km, cycle 40km and run 10km, but the triathlon transitions are often called the fourth discipline and can be decisive.

Elite tennis can be won or lost on the smallest of margins, and the pressure often serves up incredible tension and thrilling matches.

This knockout martial arts competition awards athletes points for how they attack their competitor.

Shooting disciplines include rifle, shotgun and pistol. Athletes must possess great technique, nerve and concentration.

Sailing a boat through the finish line takes strategy and skill, but sometimes nature gets in the way.

Olympic rugby previously involved teams of 15, but the seven-a-side version made its debut in 2016.

Rowers compete in sculling and sweep-style races, with men's and women's individual and team events.

This Japanese sport tests strength, flexibility, agility, speed, balance, power and endurance.