South Korea is back in San Diego looking to settle some unfinished business.

South Korea returns to PETCO Park to face Mexico in the second round of the 2009 World Baseball Classic on Sunday, hoping to erase the memories of its loss to Japan on the same field in the 2006 WBC semifinal round.

"Three years ago, we lost to Japan," South Korea manager Kim In Sik said. "I can remember it very well. But in baseball, sometimes you can lose by a little but you can also lose by a lot."