Midfielder Nigel de Jong is doubtful for the Netherlands' FIFA World Cup™ quarter-final after injuring a groin in the victory over Mexico on Sunday, coach Louis van Gaal said.

Van Gaal described the injury as a "big setback" as he plans for the Salvador quarter-final on Saturday. The AC Milan player came off the field after just nine minutes.

De Jong's return "will be difficult for the next match" Van Gaal told reporters after the 2-1 win took his side through to the last eight.