Brisbane second-row forward Alex Glenn says his side beat themselves in their 27-18 World Club Series loss to Warrington on Sunday morning.
The Broncos were never in the game, with the Wolves scoring in the second minute before jumping to a 20-0 lead after just 18 minutes.
It meant Brisbane were forced to play catch-up from the outset and they did not cope with the added scoreboard pressure, struggling to execute in front of a hostile crowd in cold conditions.
Wayne Bennett's men made 11 errors and completed at 66 per cent, a huge difference maker when compared to Warrington who made just one error and completed at 97 per cent.
According to Glenn, this poor ball control and his side's lack of discipline cost the Broncos the game.
"Our completion rate was the biggest issue. We made too many errors," Glenn told Broncos.com.au after the loss.
"We didn't show enough discipline. We gave them easy yardage coming out of their own end.
"There were too many penalties and that gave them a lot of momentum.
"They were rolling down the field and that made it hard for us because we were defending on our own line a lot.
"It's something we need to learn from and rectify. Our disciple needs to be fixed.
"At the end of the day, we beat ourselves."
Brisbane will need to regroup quickly, with their season opener against Cronulla-Sutherland fast approaching.
The Sharks also struggled in England, losing their World Club Challenge match to the Wigan Warriors 22-6.
It's the first time both Australian sides have lost in the World Club Series since the concept was introduced in 2015.
Gracious in defeat, Glenn said the Super League sides deserved credit for their victories and that the Broncos would use the loss as motivation heading into Round 1.
"Full credit to Warrington, they came out and played a complete team performance," he said.
"We need to recover well and begin our preparations for Round 1 because it's not going to be any easier against the Sharks.
"We will have to learn from this, but we will be a lot stronger in a couple of weeks time."
