Sub request during serve

[Scrapper1]

Originally Posted by SNIPERBBB

Is there any preventative officiating we can do here? As R2 you're on the receiving teams side watching that side so we should be able to see them coming? Can/should we wave the player back before they get to the sub zone?

They came to the zone after the whistle for serve. Because it was in a convention center, maybe they didn't hear the whistle -- I'm not sure. If I were a better ref, I might have remembered that they usually sub at that spot in the serving order. But other than that, I don't think there was anything more that I could have done to prevent it.