The South Korean men's Olympic football team jumped to the top of Group B on Sunday, after thrashing Romania four-nil.
Midfielder Lee Kang-in scored twice, helping South Korea their first three points in Tokyo.
Despite losing to New Zealand in their first match, South Korea has three points like the three other teams.
But with a goal difference of plus-three, they are top of Group B.
It means South Korea only need a draw against Honduras on Wednesday to advance.