"But then um . . . I don't know; one mistake after another and then it goes." says Anand.
After Game 4 proved to be another uneventful draw, Anand's near perfect moves seemed to give one the impression that he will successfully defend his title. But disastrous end games in Game 5 and 6 suggests otherwise. Maybe fatigue? Maybe stress? Maybe too much esteem from Games 1 - 4? Anand fades in endgame.