 Since his comeback for Feyenoord, he became a first-choice regular in the Feyenoord team.His appearances for Feyenoord were noticed by the national team coach Bert van Marwijk, who officially stated to be following him in the run-up to the 2010 World Cup.However, not yet calling Vlaar to the national team, due to the severity of his previous injuries, allowing him to gradually come to full fitness and preventing overuse of muscles since Vlaar only came back to first team football in the summer of 2009.