A brilliant goal by former Liverpool forward Asisat Oshoala helped earn Nigeria a first win at the 2019 Women’s World Cup and all but end South Korea’s hopes of reaching the last-16.
Nigeria went ahead when defender Kim Do-yeon volleyed past her own keeper.
Ex-Arsenal player Oshoala held off a defender before rounding the keeper to score Nigeria’s second goal.
South Korea, who face Norway in their third and final group match on Monday, have yet to score or earn a point.
Nigeria will confirm a place in the knockout stage if they beat hosts France, one of the tournament favourites, on Monday in Rennes.
However, they could also advance as one of the four best third-placed teams.