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Shot Stats[0] is another Tennis related kickstarter currently going on. [0] https://www.kickstarter.com/projects/laviesak/shot-stats-challenger-make-your-tenni

• AjithAntony 12y ago
  Attaching to the racquet does seem like a better idea. I'd be more inclined to believe it could do things like measure the speed and angle of the head better, than at the wrist.