Ange Postecoglou today brought the shutters down on his final training session in Vitoria in a bid to keep prying eyes at bay.
He voiced fears about Chilean journalists at the Australian camp acting as spies for their national team, feeding vital information back to their coaching staff as both sides prepare for their all-important opening clash.
"I am sure they getting information back - and hopefully it is misleading!" he told Fox Sports. "Our scouts aren't as good - they are struggling to get into their training sessions, but that's okay...
"Our meaningful stuff will be behind closed doors."
True to his word, Postecoglou gave nothing away about his starting XI for Friday night's clash (Saturday morning AEST) in the last training session at their camp in Vitoria.
Players were simply put through their warm-up stretches and a jog around the stadium before all media were banished from the stands under threat of banishment for the rest of the tournament if they tried to breach security.
After training, the team will spend the rest of today with their family at the nearby team hotel before flying out to Cuiaba tomorrow morning, with one last workout at the match venue 24 hours before kick-off.
However the news from within the camp was good, with every single player getting a 100 percent clean bill of health, meaning Postecoglou has every option available for him when he selects his starting line-up.