The 2013 US Open final says otherwise. Nadal winning the third set of that match when under huge pressure from a Djokovic onslaught is the reason why he won the fourth set 6-1, and won the match with it.
Nadal is still ahead on the overall head-to-head by 22-19, leads 8-3 in their head-to-head in majors including winning the last 3, and has better career achievements. Djokovic only winning 1 of the last 8 majors is very poor for him in what is supposed to be the prime of his career. Djokovic currently holds none of the majors. The last time that happened to Nadal, he was going through a serious crisis of confidence and was going through an 11 month period where he didn't win a tournament. Yet the Djokovic fans seem very arrogant for a guy who holds none of the majors at the present time.