That's why I think the final game became sort of a microcosm of the match as a whole. Ian's concentration slipped and he was thinking of making a draw, and the match situation, and not the position at hand, and when Ding rejected the draw he was too flabbergasted by it to handle the position whereas Ding just kept calculating.
It was a very tight match, and both players would have deserved it had they won they tie break. But I think overall in decisive moments Ding was just a little bit more collected and concentrated, and that's why he ended up winning.