Son Heung-min stood in shock as South Africa beat South Korea 1-0 on June 25, pushing them to third place in Group A.
What happened?
South Korea's fans had come to Estadio Monterrey in large numbers, expecting a win or draw to advance to the knockout phase.
But the team's performance raised questions about their identity with and without Son Heung-min.
The 33-year-old captain is South Korea's most-loved son and record appearance-maker.
He has helped deliver iconic World Cup victories, including against Germany in 2018.
Why it matters for Son Heung-min
Son Heung-min's status in his home country is unlikely to change, but he is no longer untouchable.
Head coach Hong Myung-bo dropped him to the bench for the crucial game against South Africa.
Son has not had an easy time, with no goals in 13 Major League Soccer appearances for LAFC this season.
What comes next?
South Korea now face a frustrating wait to confirm their participation in the round of 32.
They have a 94% chance of progressing, with a likely tie against the winners of Group G.
Son Heung-min and his team will have to regroup and find their identity to advance in the World Cup.
The team's fans will be hoping for a better performance in their next match.
Son Heung-min has been playing at No 9 for club and country, but there have been questions over whether this is his best position.
He was substituted before the hour against Mexico last Thursday.
His most recent World Cup goal was in the win against Germany eight years ago.
South Korea's next match will be crucial in determining their World Cup fate.
The team will have to work together to find their identity and advance in the tournament.
And Son Heung-min will have to lead by example to inspire his team to victory.
But for now, the team's identity crisis continues, with or without their talisman, Son Heung-min.