LeBron James is on a mission to put USA Basketball back on top of the world.

In a game that was decided in the first 10 minutes, James scored 23 points Tuesday to lead the United States to an emphatic 116-63 win over South Korea in a tuneup game for the world championships.

"We were a little sluggish at first and I was able to pick up my energy level and the guys followed," James said. "We got better as the game went on and took care of business."