LONDON — Arjen Robben is the latest World Cup injury scare despite the Netherlands crushing Hungary 6-1 Saturday while host South Africa boosted its hopes with a 1-0 warmup victory over Denmark.Robben limped off with a left hamstring injury after scoring twice in an impressive Dutch display in Amsterdam, with teammates fearing he could be the latest big star to be ruled out of the World Cup.In other warmup games, the United States beat Australia 3-1 and Ghana beat non-qualifier Latvia 1-0. (AP)