Son Heung-min proved the hero as South Korea defeated Australia 2-1 in extra time to progress to the semi-finals of the Asian Cup.

Victory kept alive South Korea's hopes of a third Asian Cup title and a first since 1960, as they teed up a last-four tie with Jordan, who beat Tajikistan 1-0.

South Korea had to do it the hard way at Al Janoub Stadium on Friday, after Craig Goodwin volleyed Australia ahead in the first half.

Hwang Hee-chan’s stoppage-time penalty forced extra time, however, with Son's spectacular free-kick in the 104th minute securing the win, with Aiden O'Neill's VAR-awarded red card then compounding Australia's frustration.

"This isn't really the way we want to win matches but we were ready to battle hard," Son said.

"Winning this way will help with the morale of the whole team. I was really touched by the sacrifices that everyone on the team made. Each and every one of the team deserves to be complimented."

Australia goalscorer Goodwin said: "We were one minute away from going through.

"If we had taken those chances, we could have put the game to bed but Korea is a great team with great players and we gave them some opportunities from set-pieces that we didn't need to. And when they have quality like that with Son, they punished us."

South Korea's victory came after Jordan had snapped the dream run of tournament debutants Tajikistan.

Vahdat Hanonov's own goal midway through the second half proved decisive at Ahmad bin Ali Stadium.

Mousa Tamari had the chance to extend Jordan's lead but the winger shot just wide from inside the area.

Australia defeated Indonesia 4-0 on Sunday to advance to the quarter-finals of the Asian Cup, where they will be joined by tournament debutants Tajikistan.

Two goals in the first half put 2015 Asian Cup champions Australia in control in the last-16 clash with Indonesia at the Jassim bin Hamad Stadium on Sunday.

Martin Boyle's header added to an early own goal from Elkan Baggott.

Late strikes from Craig Goodwin and Harry Souttar scuppered any hopes that Indonesia, playing their first game in the knockout stage, may have had of getting back into the match.

"We knew they would come out here with nothing to lose today, we knew they would come and fight and run," said Jackson Irvine, who had a hand in two goals.

"In the first half they caused us some problems with their energy and intensity but our experience and professionalism shone through in the second half and I think we had too much for them on the day."

Indonesia had chances, coming close after just six minutes but Rafael Struick fired over from close range. With half-time looming, Yakob Sayuri fired wide while unmarked on the left side of the area.

"I am very proud of my team,” said Indonesia captain Jordi Amat. "We knew from the start it would be a tough game. They were more clinical in the first half. We had our chances but couldn’t score. We need to work and come back stronger."

Australia will face the winner of Tuesday's tie between heavyweights South Korea and Saudi Arabia.

Meanwhile, Tajikistan will take on either Iraq or Jordan after they overcame the United Arab Emirates 5-3 on penalties, following a 1-1 draw at Ahmad bin Ali Stadium.

Tajikistan's resolve could easily have faltered after Khalifa Al Hammadi's equaliser deep in second-half stoppage time cancelled out Vahdat Hanonov's opener and forced extra time.

But with a shoot-out required to settle the contest, goalkeeper Rustam Yatimov was Tajikistan's hero when he kept out Caio Canedo's spot-kick, with Alisher Shukurov keeping his cool to continue the minnows' dream run.

Tajikistan claimed a famous 2-1 win over Lebanon to progress to the last 16 of the Asian Cup on their tournament debut.

Lebanon took the lead early in the second half with a curling shot from Bassel Jradi, but they were reduced to 10 men when Kassem El-Zein saw red in the 54th minute.

Tajikistan had two goals ruled out for offside but finally scored with 10 minutes remaining to seal their progress from Group A.

Parvizdzhon Umarbaev restored parity, with Nuriddin Khamrokulov heading home a winning goal in the second minute of second-half stoppage time.

Coach Petar Segrt said: "Every day we stay here longer is fantastic. We have our first dream: To make the last 16.

"We have our second dream: we want to go to the second round. Now we dream again.

"This is football. Every one of us has a dream."

Asian Cup hosts Qatar, meanwhile, finished their group campaign in style on Monday with a spectacular volley from Hassan Al-Haydos for a 1-0 win over China, who are on the brink of elimination from the tournament.

The deadlock at the Khalifa International Stadium was broken midway through the second half with an unforgettable strike. Akram Afif's corner was immediately met outside the area by Al-Haydos, who confidently volleyed into the top corner. Both players had just been introduced as substitutes.

Qatar, who had already secured their spot in the knockout stage, topped Group A with nine points and advanced with Tajikistan, which beat last-place Lebanon 2-1 to take second with four points.

China finished with just two points and failed to score in any of their three games. They have never won the Asian Cup and must now wait for other results, but they have only the faintest of chances of squeezing into the next round as one of the four best-performing of the third-placed teams in the six groups.

Qatar may have lost all three games on home soil at the 2022 World Cup but has been perfect in the Asian Cup, advancing to the round of 16 by winning all three games without conceding a goal.

Qatar became the first team to advance to the knockout stage of the Asian Cup after a 1-0 win against Tajikistan on Wednesday.

Akram Afif scored his third goal of the tournament to secure victory for the host nation and defending champions at Al Bayt Stadium.

As hosts of the World Cup in 2022, Qatar exited the competition at the group stage after three straight losses, but now maximum points from their opening two games in the Asian Cup have ensured they advance as group winners.

Afif lifted a shot over Tajikstan goalkeeper Rustam Yatimov in the 17th minute and Tajikistan finished the game with 10 men after Amadoni Kamolov was sent off in the 81st.

The other Group A contest between China and Lebanon finished 0-0.

After back-to-back draws, China likely need at least a point against Qatar in their last game to have a chance of advancing.

Both China and Lebanon's hopes of reaching the round of 16 are in the balance. While China are second in Group A on two points, they have the daunting task of facing Qatar in their final game, knowing a loss could see them overtaken by Lebanon or Tajikistan.

"We know that we depend on ourselves and that is something that every team would like to be in that position before the last game," China coach Aleksandar Jankovic said. 

"No matter if we play against a host country, Qatar, with their World Cup experience, we still depend on ourselves and I always like to be in this kind of situation."

Hassan Maatouk and Hasan Srour hit the bar for Lebanon either side of half-time, while Wu Lei thought he had broken the deadlock for China in the 65th minute, only for his close-range shot to be hooked off the line at Al Thumama Stadium.

China were quarter-finalists in each of the last two Asian Cups.

Lebanon lost 3-0 to Qatar in their opening game and sit bottom of the group with one point, but could still advance.

"It is a very important point for us, especially after a tough defeat against Qatar," coach Miodrag Radulovic said.

Australia are up and running in the Asian Cup after second-half goals from Jackson Irvine and Jordan Bos broke India's resistance and secured a 2-0 win.

The 2015 champions are out to reclaim the title in Qatar and were given an early test against a stubborn opponent and a raucous crowd at Ahmad bin Ali Stadium.

Australia dominated the Group B match, but struggled to find a way through India's determined defence until goalkeeper Gurpreet Singh Sandhu failed to claim a high cross from Martin Boyle five minutes after the break and Irvine pounced to fire home from close range.

Bos, a substitute, had only been on the field for a minute when he converted Riley McGree's low cross at the far post to double the lead in the 73rd.

"We can improve on everything and the boys know that," Australia coach Graham Arnold said. "We have our standards and I have high expectations of the players and their performances and those expectations and standards need to be met."

The match was the first in the history of the Asian Cup to be officiated by a female referee, with Japan's Yoshimi Yamashita in charge.

Australia are two points clear at the top of Group B thanks to a 0-0 draw between Uzbekistan and Syria.

Uzbekistan are hoping to be the main challenger to Australia, but they failed to make their pressure count at the Jassim bin Hamad Stadium.

Syria looked to have taken the lead in the second half through Ibrahim Hesar, only for the goal to be ruled offside.

In Saturday's early match, Tajikistan, making their Asian Cup debut, held China to a 0-0 draw in Group A.

Alisher Dzhalilov came close to putting Tajikistan ahead in the first half, while China's Liu Binbin had a shot cleared off the line after the break and Zhu Chenjie saw a goal ruled out by VAR.

Reigning champions Qatar top Group A after a 3-0 win over Lebanon on Friday.