Yes I am old and even though I was a formidable single player who went to National with USTA team. I now only play doubles since my body is old. If I play a singles match, I still do well but need at least a week to recover.
I was referring to doubles for sure! Sorry about that! And many of these guys admit they footfault. I was thinking of these guys in particular who dont think footfaulting matters. For them it wont matter if you call them out when they hit the line since they dont respect the lines. Of course I would warn them in advance. I think its a good deal for them. After all they still get to footfault and many even ace you as long as they dont hit the lines.