Scoring Right Portable Tennis Racket and Padel Scorekeeper, Easily Mounted Small Score Board to Keep Score of Points, Games, and Sets, ITF Conforming and Lightweight Mini Score Keeper, 1.9g $14.95 $ 14 . 95
https://www.amazon.com/Portable-Numbered-Tracker-Scorecard-Scorekeeper/dp/B07BTD92T5