Roger Federer spoke about how he handles his schedule: "It's a fine line.
It all maybe depends a little on where is the body? Because regardless, if you're going to play matches or -- I mean, the thing is when you don't play matches, you can control your schedule much easier. You can wake up in the morning and say, Ah, stiff back.
What do you guys think? Well, let's take a day off and let's practice twice the next day. When you're having matches, you can't say, like, Ew, tournament, can I play tomorrow? Today is not my day."