Tennis trigger help

I want to back the player who has match ball. Any help with correct condition ?

Hello!

To check who the server is, use the following condition:

Selection's Index is equal to tennis_current_server

Note: the match score must be available for this game, i.e. the yellow box beneath the list of players (see the attached screenshot). For that purpose, activate "Download match score" and "Download tennis scores" in Monitoring Options.

Sorry, i meant Match Point.