for a man of your age you look to be in a good shape and more importantly you have all your hair.
i'm not in perfect shape indeed, but i'm not exactly fat as well.
yeah, hair is there, way too grey for my age, but that's that.
On topic though, here is an example of a medium level amateur tennis in Bulgaria (the first part, guy with yellow shirt) - http://www.youtube.com/watch?v=BzHIF7-pjN0
In a first or second round i'm probably slight favorite against him. 3rd and above he'd probably beat me (we play 4 rounds in a day, then semies and final the other, one set matches), coz i need to be fresh to beat such a guy.
But this guy is already much better than Johnny imho.