Kana Oyama and Saori Kimura scored 14 points each to lead Japan to a straight-sets win over archrival South Korea in the women's volleyball World Grand Champions Cup on Wednesday.

Japan struggled with serve receives early on and rallied to take each of the first two sets en route to a 25-23, 27-25, 25-21 win at Tokyo Metropolitan Gymnasium, improving its record to 1-1 in the quadrennial six-team tournament.

In other action, World Grand Prix winner Brazil cruised to a 26-24, 25-18, 25-21 win over European champion Poland for its second straight victory, with Welissa Gonzaga having a game-high 20 points. Poland, which defeated Japan on Tuesday, is 1-1.

The United States upset defending champion China 25-22, 25-23, 26-24 to earn its second win in as many days while handing the Athens Olympic gold medalist its second loss in a row.