Defending champion Germany, whose World Cup stint was marked by racist attacks on its Turkish-origin players, was eliminated Wednesday from the competition after losing 2-0 to South Korea.
One of the favorites to triumph in Russia, Germany finished bottom in Group F after Sweden beat Mexico 3-0 in the other match to qualify for the last 16 along with its opponents.
Germany coach Joachim Loew, who has a contract until 2022, did not rule out resigning after the four-times champions became the fourth holders in the last five World Cups to go out in the group stage.
"It is too early for me to answer that question," he told ZDF.
"We need a couple of hours to see things clearly. The disappointment is deep inside me. I couldn't imagine that we would lose to South Korea."
Loew's side found it tough to break down South Korea's stubborn defence despite dominating possession at the Kazan Arena and were shocked by late goals from Kim Gwon Young and Son Heung Min, which were not enough to help their side through.
Kim stabbed home from close range in stoppage time but was initially flagged offside. The goal was given after an agonizing delay when the referee analysed it via the video assistant referee system and saw the last touch had come off a Germany player.
Then with Germany fragmented and desperate, Ju Se Jong robbed goalkeeper Manuel Neuer of the ball inside Korea's half and released Son, who ran through and rolled home.
However, late goals from Kim Young Gwon and Son Heung Min were not enough to help South Korea through either.
"There is huge disappointment. It is deathly quiet," Loew told reporters after the match, describing the atmosphere in the German dressing room.
"In this tournament we didn't deserve to retain the title. We didn't deserve to move into the round of 16," he said.
Many have blamed the failure on a divided team that has been demoralized by recent acts of racism involving some of its players.
Germany's Mesut Özil and Ilkay Gündoğan, both of Turkish origin, experienced pressure and insult for weeks from German fans after posing with President Recep Tayyip Erdoğan during his visit to London last month.
The attacks reached a point where Gündoğan's car was vandalized in the German city of Cologne.
German police confirmed that Gündoğan filed a complaint against unknown persons after his car was vandalized during a friendly game on June 7 against Saudi Arabia.
Loew called on German fans to stop booing Özil and Gündoğan after the Premier League stars found themselves at the center of a political row.
"My job is to get both players, who have certainly suffered from this situation, in good shape," said the head coach on Wednesday at Germany's first press conference in Russia.
"It may be that these players will still be accompanied by whistles. So be it. I wish it were otherwise. My job is to get them in the flow to help the team."
As the attacks showed no sign of stopping, Loew then said he would be benching Özil and Gündoğan for their match against Sweden, citing their below-par performance.
Germany's defeat in the World Cup wasn't bad news for all.
Sweden, who were defeated by Germany last minute in the second round, took a jab at the Germans and wished them a pleasant trip back home.
The shocking news also sparked celebrations among Turkish social media users, who welcomed their brother nation South Korea's victory. Normally, Turkish football fans would have supported Germany but this time were happy to see the Germans knocked out due to several racist attacks against the team's members of Turkish origin, as well as the coach's decision to exclude Mesut Özil and İlkay Gündoğan from their match against Sweden.
This is the first time Germany failed to make it through the opening round of the tournament since 1938, featuring in every edition between 1954 and 2018.
It's also the third consecutive World Cup in which the holders have crashed out in the group stage.
France, holders of 1998 World Cup, got eliminated in 2002 in the group stages. Italy, champions of 2006, got ousted in 2010 tournament in the group stages. 2010 champions Spain were knocked out in 2014 group stages.
Germany, 2014 champions, are out of Russia 2018 after group stages, their first exit in the World Cup group stages in 80 years. Some have deemed this unlikely coincidence the World Cup curse.
