Nigel de Jong and Ron Vlaar gave Netherlands a sizeable boost on by returning to training on the eve of their 2014 FIFA World Cup Brazil™ semi-final against Argentina in Sao Paulo. De Jong, the 29-year-old AC Milan midfielder, has not played since tearing a groin muscle during his side's 2-1 victory over Mexico in the last 16 on 29 June. Dutch medical staff initially predicted that he would be sidelined for between two and four weeks, but he completed the warm-up at Sao Paulo's Estadio do Pacaembu in part of the session open to the media. Aston Villa defender Vlaar, 29, was also present, despite reports he was a serious doubt for Wednesday's game with a knee complaint. Leroy