What data would I gain access thanks to the PLAY rackets (comparison with POP)? September 25, 2018 20:13 Updated Follow Related articles Do I Need a PLAY racket to use the app? Quick Start Guide Babolat App Why do we only have a percentage of power, and not a speed (in km/h or mph) for the forehands and backhands? What is 100% of power for the forehands and the backhands? Comments 0 comments Article is closed for comments.