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| Federer service toss behind Wawrinka. (clike to enlarge) |
Notes
1. Ball toss is directly over Federer's head.
2. Racket face is 90 degrees to the face of the net.
3. Federer's eyes are completely focused on the part of the ball he will strike.
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| (click to enlarge) |
Notes
1. Back is partially turned toward the net.
2. Deep knee bend for spring up toward contact point.
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| (click to enlarge) |
