South Korea have suffered their second straight defeat against the United States in women's football.

South Korea, world No. 15, were blanked by the top-ranked US 6-0 at Sahlen's Stadium in Cary, North Carolina, on Sunday (local time) after giving up four goals in the first half.

This was South Korea's second straight loss to the US, which beat the visitors 3-1 at the Mercedes-Benz Superdome in New Orleans last Thursday. The Taeguk Ladies now mark two draws and nine losses against the US in their 11 meetings.

South Korea, led by head coach Yoon Duk-yeo, surrendered two goals to Samantha Mewis in the first 20 minutes.

Mewis opened the scoring in the third minute after she headed down an Abby Dahlkemper corner. In the 20th, South Korean goalkeeper Kang Ga-ae punched a cross from Lindsey Horan, but Mewis thundered the rebound home with her right foot.

The Americans scored their third goal in the 35th when Christen Press' powerful shot from distance beat Kang.

Yoon's side could have cut the deficit in the 40th. Lee Geum-min had a one-on-one opportunity in the box, but her right-footed effort was denied by US goalkeeper Ashlyn Harris.

The hosts further punished the visitors in the first half stoppage time as Julie Ertz's header found the back of the net following a set piece.

In the 60th, South Korea conceded their fifth goal when Lynn Williams tapped home a cross from Megan Rapinoe. Making things worse, South Korea lost their goalkeeper Kang five minutes later after she collided with Williams. Kang was later replaced by Kim Min jeong.

The US saw Carli Lloyd's header hit the post in the 78th, but second-half substitute Allie Long rounded off the scoring six minutes later with her right foot.

The South Koreans will return home Tuesday. The two friendly matches against the US were South Korea's tune-ups for the 2018 Asian Football Confederation Women's Asian Cup, which also doubles as the qualifying tournament for the 2019 FIFA Women's World Cup. (Yonhap)