1421 BST: The final whistle blows and the Munhak stadium erupts. Portugal's distraught players slump to the turf, as South Korea celebrate joining co-hosts Japan in the second round. South Korea finish top of Group D, ahead of the USA, and will play Italy on Tuesday.
90 mins (+3): Sergio Conceicao's last gasp shot is well-saved by Lee Woon-Jae.
90 mins (+2): Portugal throw men forward in a bid to rescue their World Cup, leaving space for South Korea to exploit.
90 mins: Ahn Jung-Hwan misses an opportunity to relieve the pressure on South Korea, hitting his shot at Vitor Baia after being put clean through.
89 mins: Agonising screams from the crowd as Sergio Conceicao hits the inside of the post after an Abel Xavier throw.
88 mins: Park Ji-Sung outpaces the tired Portuguese defence and races into the box but Vitor Baia is out quickly to stave off the danger.
85 mins: Nuno Gomes spurns a golden opportunity to keep Portugal in the World Cup. Fernando Couto's header on finds the striker in space in the box but he toe-pokes the ball straight into the goalkeeper's arms.
83 mins: Jorge Costa is booked for a foul on Park Ji-Sung.
81 mins: Portugal are unable to gain possession and their players are inevitably tiring.
77 mins: In a last bid to get the goal they need to save themselves from a first-round exit, Portugal replace Petit with striker Nuno Marques.
75 mins: Luis Figo's free kick curls agonisingly wide.
74 mins: Kim Nam-Il is booked for a foul just outside the area on Petit.
74 mins: Portugal introduce Abel Xavier.
70 mins: South Korea earn just reward for their domination of the match with a goal from the outstanding Park Ji-Sung, who dummies Sergio Conceicao before driving his shot between Vitor Baia's legs.
Portugal 0-1 South Korea
69 mins: Portugal bolster their defence by replacing striker Pauleta with Jorge Andrade.
66 mins: Portugal are reduced to nine men after Beto receives his second yellow card for a late challenge on Lee Young-Pyo.
65 mins: Clearly playing for the draw they need, Portugal commit only three players forward for a free kick which South Korea clear easily.
62 mins: Portugal make a rare foray in to the South Korean half and earn a corner. Pauleta flicks the ball on to the waiting Fernando Couto but Yoo Sang-Chul intercepts and flicks the ball out of the danger area.
60 mins: South Korea continue to dominate possession but they appear to be running out of ways to break down the Portuguese defence. Nonetheless, the noise in the stadium grows.
57 mins: Seol Ki-Hyeon is booked for a challenge from behind on Petit.
52 mins: Lee Woon-Jae is pressed into a rare save from a speculative shot by Petit.
50 mins: Yoo Sang-Chol's header from a pinpoint cross goes just wide as South Korea continue to look the more likely side to score.
49 mins: Another flowing passing movement ends with Yoo Sang-Chul's long-range shot going over.
47 mins: Song Chong-Gug makes a darting run down the right wing and is tackled from behind by Luis Figo. From the ensuing free-kick, Seol Ki-Hyeon's header drifts narrowly wide.
46 mins: The second half kicks off with neither side making any changes.
1317 BST: The half-time whistle blows after an impressive first-half display by South Korea. Joao Pinto's sending-off has clearly unsettled the Portuguese but as it stands they will still progress along with the co-hosts, with Poland winning their match against the USA.
45 mins: Song Chong-Gug, carrying out an effective marking job, again dispossesses Luis Figo.
43 mins: Portugal settle for keeping possession in defence, knowing a draw would put them through.
39 mins: In an incident which typifies Portugal's first-half display, Pauleta gets himself into a good position on the right wing but his pass to Sergio Conceicao goes straight out of play.
36 mins: Luis Figo threads a clever ball through for Pauleta, but the striker hurries his shot and it flies over.
32 mins: Vitor Baia gingerly gets to his feet, holding his right shoulder, but he is able to continue.
30 mins: Park Ji-Sung continues to terrorise the Portuguese defence and earns his side a corner. Kim Tae-Young puts the ball in the net but the goal is disallowed for an illegal challenge on Vitor Baia who stays down injured.
27 mins: Portugal's Joao Pinto is sent off after a dangerously wild challenge on Park Ji-Sung. The referee is surrounded by protests, and Fernando Couto grabs the Argentine official's shoulders and face, but he stands firm.
25 mins: South Korea's Kim Tae-Young is booked for a foul.
23 mins: South Korea gain a free kick by the right corner flag, but Vitor Baia gathers easily.
22 mins: Portugal's Beto is booked for the second time in the tournament after a crude challenge.
20 mins: Yoo Sang-Chul's fires a left-footed shot wide of the post after good work from Park Ji-Sung.
19 mins: Luis Figo's control lets him down allowing Yoo Sang-Chul to steal the ball from him.
17 mins: South Korea remain the most impressive side on the pitch, with Portugal struggling to impose themselves, but there is yet to be a clear-cut chance.
13 mins: Seol Ki-Hyeon shows a turn of pace which could frighten the Portuguese defence but his final ball is disappointing.
11 mins: Portugal are yet to put their passing game together, with South Korea pressing them into errors.
8 mins: Petit earns a free kick for Portugal and from a dangerous cross, South Korea do well to clear their lines.
4 mins: Roared on by the enthusiastic home support, South Korea make all the early running. Lee Young-Po has the first attempt on goal, but his powerful effort flies over.
1230 BST: The action gets underway in Incheon's Munhak stadium with Portugal kicking off.
Portugal make one change to the team that overwhelmed Poland in their previous game in Group D.
Beto returns to the right-back position, taking over from the injured Nuno Frechaut, after starting in his side's devastating loss to the USA in their opening match.
Abel Xavier has been overlooked.
South Korea, bidding to join co-hosts Japan in the second round, are boosted by the return from injury of Lee Young-Pyo, who replaced Lee Eul-yong.
Ahn Jung-Hwan, who came on as substitute to score an equalizer against the USA, starts for the first time in the tournament.
South Korea require a draw to qualify for the knockout stages while Portugal need a win unless Poland can beat the USA.
Portugal: Vitor Baia, Nuno Frechaut, Rui Jorge, Jorge Costa, Fernando Couto, Armando Petit, Paulo Bento, Luis Figo, Joao Pinto, Pedro Pauleta, Sergio Conceicao.
South Korea: Lee Woon-Jae, Choi Jin-Cheul, Kim Nam-Il, Yoo Sang-Chul, Kim Tae-Young, Seol Ki-Hyeon, Lee Young-Pyo, Ahn Jung-Hwan, Hong Myung-Bo, Park Ji-Sung, Song Chong-Gug.
Referee: Angel Sanchez (Arg)