Indonesia quickly applied pressure in the first minutes trying to exploit Australia's organisation, but, although Indonesia pressed early, they were brutally punished in the 12th minute when Jackson Irvine produced a run that saw him overcome three Indonesian players before his shot caused Elkan Baggott to unintentionally deflect the ball into his own net to give Australia the lead.
Australia scored once again when, from a counterattack, the ball was delivered high by Gethin Jones from Indonesia's left flank and Martin Boyle quickly headed home for the second.
Although Australia reduced the tempo in the second half and allowed Indonesia more space, the Indonesians failed to score, and they were again punished in the 89th minute from another run on the left flank.
Australia completed the game in style in the first minute of added time when Harry Souttar capitalised from a set-piece by Goodwin to head home.
This result equalled Australia's second biggest win in their AFC Asian Cup history, all 4–0, which happened against Thailand in 2007, India in 2011 and Oman in 2015.
The Tajiks then put up an effective defence to neutralise Emirati attacks for the majority of the game, until the fifth minute of second half's added time when, from a set-piece by Ali Saleh, Khalifa Al Hammadi produced a header to equalise for the United Arab Emirates at.
Iraq took the lead in the 76th minute when, from a left flank cross by Merchas Doski, combined with a misjudged header by Yazan Al-Arab, Aymen Hussein delivered a low shot to the right bottom corner of the net.
As the match was heading towards extra time, a Jordanian siege followed and the ball was passed to Nizar Al-Rashdan from Al-Taamari, who then hit a long-range effort that proved to be the final goal of the game as Jordan sealed a historic victory.
Palestine scored first in the 37th minute when a pass by Bassam Al-Rawi from midfield was intercepted by Oday Dabbagh, who then overcame two remaining Qatari defenders and shot low beyond Meshaal Barsham.
Qatar levelled just before the end of the first half with a corner kick by Akram Afif to Hassan Al-Haydos, who then took a deflected shot to hit home in the sixth minute of added time.
Palestine conceded a penalty early in the second half, as Mohammed Saleh foulled Almoez Ali in the box in the 47th minute, before Afif converted from the spot to secure Qatar's win.
Uzbekistan started strongly and scored first in the 37th minute, when from a delivery from Diyor Kholmatov, Azizbek Turgunboev volleyed home to give the Uzbeks the lead.
In personal record, this match was the first time Srečko Katanec managed to win a knockout stage game in any competitive tournament, having failed to do so as coach of Slovenia, the United Arab Emirates, and Iraq.
Iran began the match brightly, but struggled to break down the Syrian defence until the 32nd minute when, from a high lob by Alireza Jahanbakhsh, Mehdi Taremi received the ball in the box.
Syria would then gain a similar penalty in the second half when, from another lob by Omar Khribin combined with a misjudged header from Shojae Khalilzadeh, Pablo Sabbag made a deep run before being fouled by Alireza Beiranvand.
After a goalless first half, the Jordanians finally broke through, albeit aided by luck when, from a corner kick at the 66th minute by Mahmoud Al-Mardi, Abdallah Nasib triumphantly headed, but it hit the back of Vahdat Hanonov before going home to give Jordan the first and, turn out, the only goal of the match as Jordan secured the hard-fought 1–0 win.
Despite South Korea dominating possession, it was the Australians who grabbed more dangerous chances to score at the first place, and Australia got the reward at the 42nd minute when, from a failed clearance by Hwang In-beom, Craig Goodwin intercepted before a number of inside the box pass by Mitchell Duke, Connor Metcalfe and Nathaniel Atkinson saw Atkinson's fickled to Goodwin for a volley to open the scoring.
Australia then put up a fierce resistance to neutralise the South Koreans but, as the game was thought to be over, a foul by Lewis Miller on Son Heung-min as the South Korean talisman was dribbling into the box right at the fourth minute of added time granted a penalty, which Hwang Hee-chan did not waste it to push the game to extra time.
Son then overturned the game in South Korea's favour when from yet another Miller's foul on Hwang Hee-chan, he took a brilliant free kick home at the 104th minute.
Ultimately, Iran got the reward at the 55th minute when Mohammad Mohebi capitalised from Sardar Azmoun's pass to neutralise Japan's offside trap before thunderously scored to put the game to a draw.
After this goal, Qatar and Uzbekistan were unwilling to commit further for frontal attacks, which extended to even the extra time, pushing the game into the sudden death.
On the spot, Meshaal Barsham proved to be the better one with his movement predictions better than the Uzbekistani counterpart, as Qatar went on to win the game 3–2 on penalties to reach the semi-finals.
Al-Taamari then brilliantly finished the game at the 66th minute following a solo by himself before his thunderous shot to the right bottom corner gave no chance for Jo Hyeon-woo to deny.
[3] The match started on a bright note for the Iranians when Sardar Azmoun, capitalising from Alireza Jahanbakhsh's throw-in that resulted in a chaotic ball fight in Qatar's box and poor attempt by Ró-Ró, delivered a brilliant bicycle kick at the fourth minute to give Iran the lead.
Empowered by the goal, Afif would soon produce a solo in Iran's right flank at the 43rd minute thanked to an effort by teammate Ahmed Fatehi before taking a curl home to give Qatar the lead.