just thought I would post this here, although its not going to do me any favours as it will help people I may be playing against in future.
I play on xbox1 X and have a 4K HDR TV, so this is for people like me or any1 on xbox one who has also has hdr tv.
first make sure you also always using GAME mode which is the TV picture setting. this is controlled by your TV, not your XBOX.
now most importantly, if your are like me and play on an XBOX1 X, u need to turn off HDR10, you will find this on the xbox setting inside your picture setting, I think its under video mode.
so basically, always play on GAME mode, this will give you lowest latency for playing games your TV can support.
and if you have an HDR setting on your xbox, switch it off.
trust me, the difference is very noticeable, I cant play otherwise, and my win ratio improves 10 fold.
this can also be done for playstation users as every should have a GAME mode setting on there TV, and am sure the playstation will have a setting for HDR that can be switched.
don't worry if you cant find the HDR setting, it means your TV probably does not support it anyway.
also I don't lose any of the quality of games 4k graphics, it just turns of the HDR setting, but also makes the picture a lot brighter which I prefer, as everyone know HDR can sometimes make the picture to dark.
now once you have done this, and before every match, just check your TV picture setting is still on GAME mode, and away you go
hope this helps.