There have been countless instances of teammates covering their mouths while chatting to each other or opposing players.
(It's) so the camera's can't see!" Walker said on BBC's You'll Never Beat Kyle Walker.
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You might be swearing, or having a little bit of banter," he added.
You might have seen them on a night out the week before, and you're just having a bit of banter, but it is what it is.
In the world we live in now, everything - you've got lip-readers now, what is this world coming to?"