1) a) Do you miss often on left/right ? If you always aim correctly left/right, with your serve Power = Consistency, then you should get 70% serves in. (ie: only net/long faults are random)
b) With 100% in Power & Consistency, you'll get an average of ~179km/h (111mph). This is a bit better than Williams at last Wimbledon final.
However, your max serve speed will be 10% above your average which gives ~197km/h (122mph), and it's is a bit under Williams best at this same match. On the other hand, Kerber max speed is very close to her average, so there's no general rule working for all cases here.
2/3/4) In what difficulty level are you playing ?
And thanks for the praise !
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