Remember, if the racquet face is closed at the low point of the backswing, it should be vertical at contact, provided you swing from the shoulder with a fixed forearm and wrist.

 
  • 记得,如果网拍面在背后拉拍的低点是关闭的,它在接触点应该是垂直的,假设你是固定前臂和手腕地从肩膀挥拍。
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