Hossam Abdelmaguid scored the winning penalty as Egypt made history by beating a dogged Australia 4-2 in a shootout to reach the World Cup last 16.
A tense affair in which Egypt and their off-colour captain Mohamed Salah wasted the better chances had ended 1-1 after 120 minutes in Texas.
Emam Ashour scored in the 13th minute for Egypt, before teammate Mohamed Hany became the first player with two own-goals in the same World Cup tournament, allowing Australia to even the score.
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"It's history," said Salah, who was emotional after his country won a World Cup knockout game for the first time.
"I told the boys before the game that this is the biggest stage you can play on. Enjoy it and don't let the pressure get to you."
Australia coach Tony Popovic threw on experienced goalkeeper Mathew Ryan for the penalty shootout in a last-gasp gamble.
Shooting towards the Egypt fans and whistles raining down, defender Harry Souttar blazed the first penalty over to put the Socceroos on the immediate backfoot.
The next five players all scored, including Salah with the coolest of penalties, before 18-year-old Australia defender Lucas Herrington hit the bar.
Abdelmaguid kept his nerve to send Egypt through to leave Salah in tears of joy and break Australia hearts.
"If somebody was going to do it, it would be me," Salah said of his cheeky chipped penalty.
"I am more experienced than others and I wanted to give them confidence. I decided last minute, I had to do it."
Salah on the fringes
Popovic's side had nearly taken the lead with less than five minutes gone as Cristian Volpato – who switched to Australia from Italy on the eve of the World Cup – rattled the top of the crossbar.
Egypt, who won a World Cup match for the first time in the group phase when they beat New Zealand 3-1, looked nervy at the back.
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Slightly against the run of play Hossam Hassan's men took the lead.
Australia forward Nestory Irankunda failed to pick up Ashour, who headed home at the back post from a cross by Karim Hafez for his second goal of the tournament.
The Socceroos had their first shot on target 10 minutes before the break when full-back Aziz Behich fired tamely at goalkeeper Mostafa Shoubir.
The 34-year-old talisman Salah, who came into the match after a hamstring strain, made little impact in an attritional first 45 minutes.
The half ended with Jordan Bos, one of the fastest players at the tournament, in a heap after a flying challenge from Rabia.
The wing-back had to be helped from the pitch and was replaced at half-time by Kai Trewin in a blow to Australian hopes.
Seconds after the restart it should have been 2-0 when Egypt's Manchester City attacker Omar Marmoush slid the ball off-target from close range.
Egypt's coach had said he was wary of Australia's physical approach, and so it proved as Hany headed under pressure into his own net from an in-swinging free-kick.
It was Hany's second own goal of the tournament.
Former Liverpool superstar Salah remained a peripheral figure but was involved in the build-up as Australian stopper Patrick Beach saved athletically in added time to keep out Ramy and force another 30 minutes.
Egypt finished the stronger and Salah fired well over early in extra time on his weaker right foot, with penalties looking increasingly inevitable.
(FRANCE 24 with AFP)
