Bigger, stronger, faster is at the core of much of the sport we watch these days and none more so than rugby. The collisions between players, often weighing more than 100 kilograms, is sometimes likened to a car crash.

Extra Time talks to Damian Hopley, the chief executive of the Rugby Players Association in England. Player welfare is at the top of his list, but as concerns grow over head injuries and with a World Cup looming later this year, are players more at risk than ever? Show less