Federer isn't in the GOAT league when it comes to sexiness but he is far sexier than people think; his skin and hair are excellent, his shoulders are broad, and his voice is deep and musical (let's ignore his attempts to sing
). People say he lacks muscles but his legs are actually massive and he has a good, high ass.
Lack of a six-pack doesn't bother me; he's lean and fit and guys don't need to have an exoskeleton in order to be sexy.
Nole doesn't scream "sexy" but he fits in that larger class of men who aren't particularly "hot" or "striking" in any particular way but who are sexy anyway just by virtue of being athletic, confident men who aren't bad looking.
Then there are guys who are truly good-looking but have little or no sex appeal. F. Lo is completely unsexy to me: he has an overly blocky/ice-cube face with a strange jawline and that coupled with the hair just does nothing for me.
Verdasco and JMG I've met briefly in person and they were both extremely good-looking but also very bland; not like I would kick them out of bed or anything
but "sexy" wouldn't be the right word for them.
Rafa is a nice guy with a nice body but he is a butterface and the fact that he still comes off as a child both physically and personality-wise is not sexy at all.
Guys that are absolutely cute but not necessarily brimming over with "sexiness" would be Robredo, Phau, Gasquet, Wawrinka, Tsonga, Ancic, Melzer, Nieminen, and the Rochuses. In some cases it is precisely the cuteness which makes them sexy (e.g. Robredo, O. Rochus).
"Sexiest Ever" are guys like:
Haas (excellent face and body, perfect ass);
Calleri (perfect face, delicious thick
Youzhny (lean with a mix of butch-bad-boy and boy-next-door looks); or
Safin (not really the type of body I immediately find attractive but sexy face and incredibly charismatic in person).