Hi,
It is currently not permitted to wear a smartwatch during official tennis matches (ITF) as this allows for messages to sent to players and thus facilitates 'coaching' which isn't permitted at that level.
I have a Fenix 6, which allows messages to be communicated, hence its classification as a 'Smart' watch. Are there any Garmin watches which can track the basic fitness measurements (heartrate, distances traveled etc.) that cannot however send/receive messages and thus not be classified as a 'Smart' watch?