I think he can only win titles on clay these days.
Has not won off clay since IW 2009.
He has regressed to being a bonafide clay court specialist.
sad but true!
is this his worst run without winning a title outside of clay?
i seem to recall he always had a non-clay title even when playing badly in the past.
i really dont know how a player that hasnt won a title outside of clay can be the world number 1.
this is like thomas muster back in the day gobbling up all the clay titles thus stealing the number 1 ranking.
roger was asked this in halle and he said the ranking system is weird.
i agree with federer on this.