Selfie stick tripod to record tennis match


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Am thinking of getting a selfie stick with tripod base and mount my iPhone to it to record myself. Since my club's indoor court only has curtains at the back and no back fence, I'm thinking the most portable/compact solution is a selfie stick that comes with tripod base.

One question I have is what is the optimum height to record video at? The best (non-dodgy) one I found on Amazon UK goes up to 1.5m when fully extended. Is that a sufficient height to record matches at?
Agree it's a bit pricey for something that's essentially a bracket on a monopod. Curious though how does one make sure the camera is capturing the correct field of view?
Trial and error. I wasted a playing footage because it was angled too low. What helps is that in between change-overs, you can pause vid and check.