The openside is, ideally one of the fittest players on the pitch. In attack he is an important support runner. The 7 is always expected to be on hand to receive the offload and be first to the breakdown. A good openside will be an expert 'jackeler' which means he should be able to win a load of turn overs at the ruck. They're expected to make lots of tackles too. It takes high levels of fitness and work ethic to be a top-class 7 and the best in the world are Richie McCaw, Michael Hooper, Sam Cane, Sam Warburton, Steffon Armitage and my hero David Pocock.