During the 2015 Rugby Championship, Cheika made multiple changes to his side for each match despite the Wallabies' winning form. They opened their campaign with a 24–20 win over South Africa, winning in overtime with a late try from Tevita Kuridrani. They beat Argentina 34–9 a week later to set-up a decider with New Zealand in the final round. It was during that All Blacks match that Cheika started two specialized opensides for the first time since 2010, and they were both influential in the Wallabies 27–19 win. The win sealed the Rugby Championship for the Wallabies, their first ever Rugby Championship title, although including the former Trinations format it was the Wallabies fourth title since the competition began 1996. The Wallabies also achieved a 100% win rate for the first ever time in either format. However, the Wallabies failed to win the Bledisloe Cup, losing to New Zealand 41–13 in Auckland a week later.