Edwin Cardona was caught on camera trying to make a slant-eyes gesture during a minor scuffle between the two teams in the second half of the match, when another Colombian player tried to bring a South Korean footballer to his feet.
Last month during the World Series, Houston Astros first baseman Yuli Gurriel made a racist gesture in reference to Los Angeles Dodgers pitcher Yu Darvish. Many fans interpreted his actions as racist and responded with outrage.
It all started when Colombia's James Rodriguez picked up Jin-Su Kim after Kim was fouled.
Cardona, a 24-year-old midfielder for Boca Juniors in Argentina, had entered the game at halftime for Mateus Uribe.
Colombia's Edwin Cardona has apologized after sparking a racism controversy during his team's 2-0 loss to South Korea in an global friendly.
Colombia head coach Jose Pekerman refused to discuss the incident when questioned by reporters following the game.
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"I didn't see that gesture and I can not comment on that", Pekerman stated.
"It was a physical game".
"I want to say I am not an aggressive person, I am sorry that something that happened during the game has been misinterpreted".
During the 2017 Under-20 World Cup in June, Uruguay midfielder Federico Valverde reportedly made a similar gesture after scoring a goal, although he insisted it was a private celebration meant for his friends. "I can't comment further on an incident that I didn't see with my own eyes".
Son was pivotal in South Korea's friendly win over Colombia on Friday as he scored both goals in his side's 2-1 victory.