Staring down the prospect of the Socceroos going the distance against Egypt, coach Tony Popovic faces a call on when to use his youthful weapons.
The round-of-32 clash with Egypt at Dallas Stadium on Friday (4am Saturday AEST) is the first time Australia's fate could come down to extra time and even penalties.
Some players could last more than 120 minutes, but others like exuberant young attackers Nestory Irankunda and Cristian Volpato likely don't have the tank.
