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Originality is a key to success in women's gymnastics. Floor, vault, uneven bars and balance beam routines are marked for the most points.

Teams of seven players compete in a fast-flowing, high-scoring and tactical contact sport.

Hockey players pass, push, flick and dribble the ball with the edges, head or handle of the hockey stick to score goals.

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

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.

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

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.

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.