As much as I agree it's not as if Federer didn't have his fair share of luck either. Tipsarevic Australian Open 2008, Andreev US Open 2008, Berdych Australian Open 2009, Haas Roland Garros 2009 all immediately come to mind!
Don't also forget Davydenko at 2010 AO (last semi of the streak but still). Best player in the world at that moment and choked horribly.
Haas in 2006 Australian Open 4th round also comes to mind. Haas could have won that match. Tough 5 setter.
Even though it was a four setter, Jose Acasuso actually came really close to a straight or 4 sets victory over Roger in 2009 FO. It was a crazy match to watch really.
I am sure there are probably one or two others.
None had match points but Haas did have break point at 4-4 in the 3rd set. Tipsaravic was also a breaker away from a 2 set to 0 lead.
What do all these players have in common though? They are chokers.
So I guess we can credit choking just as much as great play for anybodys chance at this record. The cold truth of the matter is anyone who equalls or even gets close to this record is going to have at least several of these types of matches along the way, and whether Djoker gets there or not, I suspect we haven't seen the last of the great escapes.