I'll keep you posted General. He actually was practicing on clay (click link below) at the East End of New York island during the US Open. (Har-Tru Clay)
He's going from hiking in the high altitude Alps to the Dubai desert soon, if he is not already there.
But look at this general:
Roger only played 20 something matches this year, and he is the
World's Leading Athlete with some $60 million in non-prize money income (endorsements, etc).
Federer Leads ATP Stars On Forbes List 2016 | ATP World Tour | TennisI think he'll be worth a billion or more if he is not already close to it.
Respectfully,
masterclass