South Korea warmed up for the World Cup with a 2-0 win over Ecuador in Seoul courtesy of second-half strikes from Lee Sung-ryeol and Lee Chung-yong.
Despite fielding a team made up only of domestic-based players, the South Americans proved a hard nut to crack.
Yeom Ki-hun almost broke the deadlock after 37 minutes but the Suwon Bluewings star headed Lee Dong-guk's cross against the crossbar.
Lee Dong-guk went close on the hour as his low shot looked destined for the bottom corner before a diving save from Marcela Elizaga kept his team level.
Lee Sung-ryeol had been on the pitch less than five minutes when he ran on to a header from Yeom to fire home from the edge of the area with 18 minutes left to play.
Bolton winger Lee Chung-yong sealed the win 12 minutes later by shooting home from the edge of the six-yard box.
The friendly marks the start of the final phase of build-up for the Taeguk Warriors, who are next in action against Japan on May 24.
The team then travels to an Austrian training camp that includes a May 30 clash against Belarus and a June 3 game against European champions Spain.