Goals from Lee Chun-Soo and Ahn Jung-Hwan gave them a 2-1 victory against Togo on Tuesday and they now face a sterner test against France on Sunday.
However, South Korea appear in pole position after the draw between France and Switzerland in the other group opener.
Lee, who played 32 times for us in his debut season at Spurs last term, said: "I really enjoyed the match. It was a great atmosphere.
"We were pretty nervous in the first half but that completely went away.
"The heat was tough on all of us but we drank a lot of water so we were not dehydrated and we got the result we wanted."
Lee Young-Pyo savoured the moment as South Korea chalked up their first win in the World Cup on European soil.