Sounds like he will play exhibitions but just not competitive Tennis. There is a good discussion to be had as to who the GOAT is, but for me it's Roger. The way he conducts himself, being able to do it on any surface, avoiding injuries for most of his career and the titles he has won.
In terms of results in the big tournaments it’s a toss up with him and ND, Novak arguably has the better record over all 4 Opens. That said RF is the one you would hold up as the role model for youngsters to aspire to.
I think Federer is best ever. Novak close 2nd. Nadal is ace but most of his majors are french open and other 3 he is not as good. Clay king but all round has to be federer
It was amazing how Novak dramatically improved when he discovered EPO - sorry, I mean his gluten intolerance. Yep, definitely gluten.