USA boss Juergen Klinsmann feels his players will be tested against South Korea when the two nations meet on Saturday.
The US, who are wrapping up a training camp in Sao Paulo, Brazil, host the Taeguk Warriors in California in a friendly as they continue their preparations for the 2014 World Cup.
On Saturday, South Korea beat fellow World Cup qualifiers Costa Rica 1-0 in Los Angeles and Klinsmann is now expecting a difficult show when his majority of MLS players grace the field against Hong Myung-bo's largely K-League group.
"Now, in a World Cup year against an opponent who will also be a part of the World Cup, it's something they can use to measure themselves a bit knowing that Korea's players - many are based in the K-League in Korea, so similar to us in MLS," he told ussoccer.com.
"It's a pretty good team and Costa Rica already experienced that. They had absolutely no chance against them on Saturday. We get a nice benchmark there for the group that we have together now and then we go from there.
"The couple of months before the World Cup, everybody wants to set a tone, not only for themselves individually but as an entire group you want to get positive results wherever you can because that always helps the atmosphere around the National Team."
