South Korea head coach Hong Myung-bo wants his side to put up strong showcase against Ghana on Monday in Miami in a pre-World Cup friendly.
The Taegeuk Warriors have been undergoing rigorous tactical and conditioning drills over the past 12 or so days in Miami.
The Asian giants have been lethargic in their preparations and suffered a 1-0 loss to Tunisia on May 28 at the Seoul World Cup Stadium, their last pre-World Cup contest at home.
South Korea have conceded 18 goals in their last 15 games, and the defenders will have their hands full against Ghana who are likely to field starters Asamoah Gyan, Kevin-Prince Boateng, Dede Ayew and Kwadwo Asamoah.
Hong wants his players to tighten things up on both ends against the Black Stars.
"We need to make sure we don't concede Ghana opportunities to mount counterattacks," Hong said.
"Russia (South Korea's first World Cup opponent) is strong at counterattacks, and I will keep a close watch on how we can handle such situations in tomorrow's (Monday) match."
After Monday's match, the South Koreans will travel to Foz do Iguacu, their Brazilian base camp, and will open Group H action against Russia on June 17 in Cuiaba, about 1,120 kilometers north of Foz do Iguacu.
South Korea is paired with Russia, Algeria and Belgium in Group H.