Originally Posted by toly
I also think this information is unreliable.
I agree with you. SpeedMaster's stuff is usually interesting, but he really doesn't reference where and when his samples were obtained for that given chart. On the same page he shows spins for Roger on the practice court, but those don't necessarily carry over to what Roger does in a match as anyone who has seen Roger practice knows (he sometimes is super relaxed in a practice before a match).