Like everything else in football today, the moment when Liverpool's Andy Robertson approached the linesman at Anfield last Sunday has been analysed in microscopic detail — but I wouldn't say it's all that complicated.
Perhaps it's because he's a wide player, in the immediate vicinity of an official, but Robbo's got a hell of a lot to say for himself and it was very much the case in that match against Arsenal.
There had been an earlier conversation between him and the official, Constantine Hatzidakis, and you didn't need to be a rocket scientist — or a lip reader — to work out what he was saying when he approached him again, as the teams left the pitch at half-time.