Originally Posted by Wegner
Vic Braden has measured Federer's stroke, in one instance, going from 7 MPH in the racquet head drop, 17 MPH just prior to impact, and over 50 MPH in front of his chest. Very different figures.
No, you got it wrong as usual.
Vic's analysis (with his colleague) is here. The speed goes from 7 (top of swing) to 25 (lowest point of swing) to 71 near impact (in that analysis, contact was in front of the chest).
Did you really think Federer would swing at 17 mph at impact? I think even casual tennis and golf players know that the number is way too small.