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Old 01-08-2013, 02:41 PM   #27
dominikk1985
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Join Date: Feb 2011
Posts: 5,138
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always factor in the opponent. a great return or serve is great but good is relative considering the strength of the opponent.

a number of won points is a good way to start but you don't need to serve as well to win 80% of the points against isner or raonic then you need to do to win those points against ferrer or nole.

same is true for the return, against a better server it is harder.

training all those things is great but how good it really is only shows in matches against world class players.

"Holding your serve in 80%" is not an absolute number like throwing the shot 70 feet or throw the baseball 96 but is always dependent on the opponent.

still a good serve or return does help but it is not easy to really work towards quantifiable goals.
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