| 摘要 |
A practicing device for use in developing and maintaining an accurate tennis serve. The device includes a carrier defining a downwardly open apex space, a support for supporting the carrier with the apex space disposed at the top of the path of a tennis ball properly tossed by the user in a simulated serving action, a flexible element underlying the apex base and arranged to be urged upwardly into the apex space by a tennis ball tossed upwardly to the apex space, and a signal device for providing a signal in the event the tennis ball is tossed incorrectly either upwardly through the apex space or laterally adjacent the apex space. The signal device may provide an audible signal. The support may be arranged for selectively supporting the practicing device either on the ground or on the elevated mounting. The flexible element further serves as an indicator for indicating that the tennis ball was properly tossed in the simulated serving action.
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