 Vlaar had a bad start of the season 2006–07, as he got foot injury in the pre-season match against Reading (2–1) in August.At first it seemed to be a minor injury, but Vlaar had to drop out in the 33rd minute of the season opening away match against FC Groningen (3–0).The doctors found a crack in a bone in his foot, causing Vlaar to be out for almost the entire first half of the season .