Before 2011, h2h was 16-7 in favour of nadal
all 7 of djokovic's wins were on HC and *all* were in *straights* ... he won all those by blowing nadal off court
nadal outlasted him every other time, including on HC ....
the pattern that changed in 2011 was that nole beat nadal at his own game ... even on HC, djoker didn't blow nadal off court, he grinded him down, outlasted him .... nole beating nadal on HC isn't a big surprise , but it was the pattern which he used that was a 'surprise'.
So let's not kid ourselves by saying , oh, nole used to beat him before on HC, its not a big deal if he does it in 2011 and later ...
After a tense 3 setter vs murray @ rome in 2011, he appeared as fresh as ever in the final and beat nadal in straights by grinding him down, not going for all out offense
I'm not saying this is 'proof' of nole doping , but things did change in 2011 & later and it was a significant change