Riotbeard said:
But that pure subjective opinion, and is clearly going to be based on people biases.
Based on this criteria, Novak 2011 U. S. Open performance :ras:
Coming back against Fed and destroying rafa in the final. Point being your question doesn't lead to an interesting discussion.
In all objectivity Novak's US Open win, in terms of level, does not rank up there with Fed's vintage displays at the US Open, or Nadal's 2010 win, if we're talking top to bottom (meaning his performances across 7 matches). His level in the final, at times, was miraculous. Never seen anything like it as far as court coverage, grueling rallies, and impossible shots. But I certainly wouldn't bring up the Federer match since Djokovic was outplayed for the most part. The way he hung on and managed to win it is hugely impressive from a mental fortitude, and of course that match-point return is one of the greatest single shots in the last ten years (seriously, just in terms of impact and what it ended up leading to).
It's not a knock on Novak by any means, and in part, his run to the semis not being that memorable is a result of two of his opponents retiring mid match (can't remember who the first one was but the second was Janko, who was giving Novak all he can handle for two sets, and took one of them).
So yeah, I'd say Novak's performance in the final was one of the finest displays of baseline tennis I've ever seen, and it was more impressive because he managed to keep raising his level even as Nadal raised his in the third. But as an overall run, I don't think it's even on par with some of Novak's other major wins, including the 2008 AO, the 2011 AO (his finest hour from a pure tennis perspective IMO, though not in terms of magnitude of win), and even the 2012 AO (Murray was playing out of his mind in that semi and it still wasn't good enough. Nadal must have left his soul on court and it still wasn't good enough).