Except he didn't say that...
Read it again;
Nowhere here does he say anything along the lines of "timing isn't a factor at all".
In the last paragraph he says tennis is not just a rhythm/timing game, that's far different from what you're implying that he meant.
Come on fella, you can't ask me to read again because he never said that.....maybe YOU should have read again:
"In tennis, timing is everything"... Whaaat ?
No, it's not. Nadal & Federer aren't the best players because their timing is the best. Did you ever hear that ? No ! It's because they have phenomenal technical skills and mastering of their shot making decisions (ie: do the right type of strikes in the right situation), plus an incredible mental for Nadal, and an incredible consistency for Federer.
A good timing ( = hitting the ball at the correct time) is not a cause, but a consequence : it's the consequence of a good positioning, not rushed preparation, and a body coordination learned from thousands of hours of training (it's called muscle memory).
Maybe you aren't able to infer or understand but his opening line is "in tennis timing is everything" "....no, it's not" and then he says the world's best tennis players aren't great because of their timing and that timing is basically a result of positioning, prep and coordination. That's SEVERELY downplaying the importance of timing and essentially saying it's not a factor because it's simply a result of form.......incorrect. Timing is hugely important and THE key component of any players game. There's no reading between the lines needed for that.