Are we seeing the tending down of Rafa, kinda like the trending down of Feds started in 2011.
Rafa wasn't himself on Clay this year. In the last 5 years (15 Aussie/Wimbledon/US slams), Rafa has missed 3 due to injury, he has failed to make Semis in 8 of those 12, and has same number of titles as Feds (1).
He may get healthy again and be the man to beat on clay. Outside of the French, you have to wonder if Feds Murray or Wawrinka are all more likely to win a Slam in 2016-2017
At the same time.... I think Djoker may just be the man to beat for some time. As a huge Feds fan, I honestly won't be shocked if Novak is gunning for #16.17,18 by the end of 2019