Great Britain v Australia: it's one of the great sporting rivalries and perhaps nowhere more so than at the Olympics. From 2016, sevens gets added to the Games mix, and the two nations are taking different paths as they target gold in Rio.
England, who will likely comprise the bulk of Team GB in Brazil, have committed more resources to the sport than any other nation in recent years. Their great rivals still see it as a pathway to 15s rather than a specialised sport. It's an unusual point of view for a great Olympic nation, but there are stirrings of dissent.
This month Australian James O'Connor, a former Hong Kong Sevens star, became the first high-profile 15s international to show where his priorities lie, making it plain he would sacrifice a test spot for the Games: 'The Olympics would be an unbelievable honour ... 100 per cent I want to be involved in the sevens programme for 2016,' he said.
There are no such difficult choices for England's GB hopefuls, with the Rugby Football Union offering full-time contracts to sevens players.
'Last year there were a few things off the field happening that affected a few players but now that we all know where we stand in the team and, to be honest, in English rugby we have this new ethos about us now where we're doing a job that we all love,' said England winger Matt Turner, who gave up a club 15s career at Bristol to become one of the sevens series' most dangerous players.
'There was a lot of change happening within sevens itself as a whole with the Olympics and players now have to decide whether they want to do 15s or sevens.