对于初学者来说找到正确的发球的身体位置（包括底线击球）是非常困难的。发球辅助设备是一个简单而专业级的设备，它由一个可伸展杆和尼龙粘连系统组成，可以与任一网球粘连。在把球放到合适位置，让球员击打该球就可以了。就这么简单！

Getting a feel for correct body position relative to ball position on the serve (or even groundstrokes) is a problem for many beginning players. The Serve Doctor is a simple yet professional-looking device consisting of an extension pole and Velcro system that attaches to any tennis ball. Just hold the ball in position and have the player hit it right off the rope. It's that simple!

 

 

如何使用请见录像http://www.ht-tennis.com/?action-model-name-vod-itemid-13