In the 4th set tiebreaker, being up 5-3, Djokovic missed two doable shots (one wide, one clipped the net).
Hadn't he missed, then ..... However, Nadal took advantage, and won the 4th set.
So yes it was close, but still I felt that Djokovic was somehow in control for most of the match (except the unnecessary fifth set, battle of the fittest).
It is quite clear, like Babblelot points out, that Nadal's BH is simply vulnerable against Djokovic.