While individuals will be chasing important world ranking points, a world championship will also be decided in Stockholm in the ITU Triathlon Mixed Relay World Championships.

With numerous lead changes, an abundance of action on the course, and unabashed team pride, this event can't be missed.

Participating National Federations will select two women and men to compete in order of female-male-female-male. Each athlete will complete a 300m swim, 6km bike and 2km run. After each athlete finishes his or her swim-bike-run segment he or she will tag the next athlete in the relay to make the exchange.

At the 2011 Lausanne ITU Triathlon Mixed Relay World Championships, Great Britain took top honours with the team of the Brownlee brothers, Helen Jenkins, and Jodie Stimpson. Nicola Spirig, Sven Riederer, Melanie Annaheim and Ruedi Wild led Switzerland to silver in front of a raucous Swiss crowd, while Germany's Anja Dittmer, Steffen Justus, Maik Petzold, and Svenja Bazlen claimed bronze.

While relay names have not yet been released, 20 NOCs are slated to appear in the fast and furious race, with Australia, Brazil, Germany, Great Britain, and South Africa having entered two relays each. Great Britain will defend its world title without the services of Alistair Brownlee and Helen Jenkins. They will be challenged by Switzerland, Germany and France who should be strong contenders for the top of the podium.

ITU is bidding to get Triathlon Mixed Relay into the Olympic Games programme. The format made its major games debut at the inaugural Singapore 2010 Youth Olympic Games, and will also be part of the Incheon 2014 Asian Games as well as the 2014 Glasgow Commonwealth Games.

For the start list of National Federations, click here.