Brian O'Driscoll has described Australia as one of the "smartest teams" in rugby.
The Ireland international will start for the British and Irish Lions in their opening test against the Wallabies tomorrow.
The 34-year-old told Sky Sports News: "I've said it until I am blue in the face but the Australians are probably one of the smartest teams. They invariably have very clever players in key positions and Saturday's team is no different.
"You look at the quality of the players left out of their side so you realise the calibre of the players who are going to be playing and that heightens the excitement all the more.
"No doubt they will be pulling some new things out on Saturday but we can't really worry ourselves about them. Yes, we have done analysis on them and tried to identify where they will be strong and where we feel we can go at them, but we have to focus on ourselves and get our game right and try to implement that game plan on them."
O'Driscoll is on tour with the Lions for the fourth time in his career.