I tried to prove you wrong, but you're correct.
Give those 10 respect points from Tsonga and another 200 to Fed.
Found this quote on the first google result though, haha!
He once did get a fine for violating the 'best effort' rule, though - back in his early days in 1998 during a tournament in Küblis. He did an awesome job of not retiring in that match, double faulting at least twice in every game. LOL.
Nobody's perfect.