Some follow-up numbers on Novak, for
@Federberg.
From 2007-10, Novak was 6-11 vs. Roger, 7-15 vs. Rafa, or 13-26 overall (33%). In 2011 he was 10-1 (91%) vs both of them; from 2012-17, he was 26-16 (62%).
So obviously he jumped forward in a big way vs. Fedal in 2011, and then plateaued at a more moderate but still favorable level, compared to pre-2011.
What about vs. the field? From 2007-10, he was 258-47 (85%) vs. the non-Fedal field. In 2011 he was 60-5 (92%), and from 2012-17 he was 445-36 (93%).
So in other words, it is clear that he took a big step forward in 2011 and maintained it vs. the field. Fedal adjusted somewhat to this new higher level Novak after 2011, but not the field overall.
(These numbers should be close to accurate, but I can't claim they're perfect as I was in a rush and didn't double-check).