Honesty can be unpleasant at times, but it's not about degrading someone else's hard work, passion and achievement. This is not coming from a place of honesty; it comes from a place of entitlement, and pissy-bitch envy. The people who are in the top 100 are there because they earned their spot, pure and simple. He thinks he ought to be there because he has talent and flair and can (when he feels like it) look like someone who belongs -- but doesn't always want to put in the hard yards.
not even that : if it was envy, he would have said “I was really getting pissed not to be
in the top 100,'', which would mean "I would like to be in their place".
No he needed to say for some reason : “I was really getting pissed to see who's in the top 100,''"There are some guys who I don't know who they are. Some guys, I'm sorry, with respect—they can't play tennis."
This is pure disdain, plain and simple, not even imagination, humour or anything, pure disdain.
Just like when Lenders speaks about the world number 4 (I name him because he deserves it : David Ferrer).
PS : here he doesn't call names, but he already said about an opponent "I don't even know who he is".