The New Faces of the Games

Usain Bolt, Michael Phelps, Jessica Ennis-Hill - three legendary names that will be missing from the podium in Tokyo 2020. So who will be the next generation of stars to fill the void? The BBC profiles the rising stars hoping to break through at the Games and the stars on the verge of greatness. We go behind the scenes at training camps across the globe and speak to the athletes aiming to secure Olympic success.