Nole's performance at the US Open in those 3 years drew similar results statistically, the only difference is that he lost to the goat Federer in 2007 final. He was unlucky in 2007, but I think his high level of playing could have beaten Nole 2011/2015 given an opportunity.
Djokovic by the numbers at the US Open:
Ace percentage:
2007 8.9%
2011 5.6%
2015 7.1%
First serve %
2007 60.8%
2011 64%
2015 63.5%
First serve point won
2007 76.9%
2011 72.7%
2015 74.9%
Second serve point won
2007 56.8%
2011 54%
2015 61.3%
Hold percentage
2007 89.3%
2011 83.2%
2015 89.2%
Service point won
2007 69%
2011 66%
2015 69.9%
Return point won
2007 40.2%
2011 48.5%
2015 43.8%
Despite Federer put a dent on Nole's spectacular stats at the 2007 USO final, his overall numbers remains similar to 2011 and 2015.
Djokovic by the numbers at the US Open:
Ace percentage:
2007 8.9%
2011 5.6%
2015 7.1%
First serve %
2007 60.8%
2011 64%
2015 63.5%
First serve point won
2007 76.9%
2011 72.7%
2015 74.9%
Second serve point won
2007 56.8%
2011 54%
2015 61.3%
Hold percentage
2007 89.3%
2011 83.2%
2015 89.2%
Service point won
2007 69%
2011 66%
2015 69.9%
Return point won
2007 40.2%
2011 48.5%
2015 43.8%
Despite Federer put a dent on Nole's spectacular stats at the 2007 USO final, his overall numbers remains similar to 2011 and 2015.