Japan's stunning upset of South Africa is proof the gap is closing between the haves and the have-nots, further emphasising why the Wallabies won't take Fiji and Uruguay lightly.
At the World Cup, any game is a potential banana skin.
Wallabies coach Michael Cheika says his squad, who face Fijiin their opener in Cardiff on Thursday morning, before backing up against Uruguay on Sunday, won't make the mistake of letting their thoughts wander to the big Pool A matches against England and Wales which follow.
"What we saw [from Japan's win] is if you take your eye off the ball for a minute, you will get pounded," Cheika said. "I am certainly not going to take my eye off the ball. That's the thing about rugby, it's a very humbling game.
"You do well in one scrum and you knock off in another and you'll get turned up; you carry strong once but if you don't carry strong the next time someone will pick you up and dump you."
As a close friend of Japan coach Eddie Jones, who guided the Wallabies to the 2003 World Cup final, Cheika took particular delight in Japan's monumental upset.
Not least of all because it highlighted the growing strength in Tier Two nations, and followed on from Georgia's surprise victory over Tonga earlier in the day.
"As professionalism gets a little more mature, all teams are coming here with a goal," Cheika added. "Not every team's goal might be to win the tournament, but all teams are coming with an objective. No one is coming here to participate only.
