He's a combination of injuries, disappointment, and being on the downside of his career. 31 is getting old for international soccer, so this would be his last World Cup cycle to contribute. The injuries/disappointing production have robbed him of even that. Yeah, it was just really bad luck, too. In his prime he dominates the confederations cup, dominates qualifying, makes the huge next level jump to AC Milan and then tears his mcl. An already not very quick guy gets even slower and he just never regained his form.