With the clock ticking down on South Korea’s time in the tournament, striker Son Heung-min ran free after a Portugal corner in added time and slipped a pass to Hwang Hee-chan who fired past Diogo Costa to spark wild celebrations.
After an early opener by Ricardo Horta for Portugal, Kim Young-gwon gave the Koreans hope in the 27th minute when a corner struck Portugal captain Cristiano Ronaldo on the back and fell kindly for the defender to sweep the ball home.
The last-gasp victory for South Korea catapulted them from fourth to second place in Group H ahead of Uruguay, who beat Ghana 2-0 in the group’s other game but failed to score enough goals to finish above the Asians. Portugal top the group.