South Korea squandered a two-goal lead in Jurgen Klinsmann's first game in charge on Friday, having to settle for a 2-2 draw against Colombia.
A brace for captain Son Heung-min gave the hosts a 2-0 lead at half time at the Munsu Football Stadium in Ulsan.
But two Colombia goals within five minutes of the restart restored parity, with neither side finding a winner.
Son opened the scoring 10 minutes in, with help from a Colombian gaffe.
Goalkeeper Camilo Vargas inexplicably vacated his net after passing the ball to a teammate, leaving Son -- who won possession high up the field -- to easily stick the ball into the empty goal with his left.
The Spurs star picked up his second near the end of the first half with a free kick, this time using his right foot to beat Vargas at the bottom-left corner.
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Colombia, who had barely had a sniff in the first half, turned the tables in the second with two quick goals.
James Rodriguez halved the deficit in the 46th minute, sneaking in behind multiple defenders to convert a pass from Diego Valoyes.
Jorge Carrascal netted the equaliser three minutes later, set up by Daniel Munoz following a South Korean turnover.
Colombia almost took the lead in the 69th minute, with Rafael Santos Borre's header hitting the crossbar.
With only a few minutes left, South Korea also came close to scoring as substitute Oh Hyeon-gyu rolled a left-footed shot past the diving Vargas -- only for a defender to clear the ball out of harm's way.