This falls under the "not 100% sure" so he can get away with it being in the grey area, it's when we get the Mané on Ederson challenge that the ref has no choice but to give a red card.
If we had a history of uncompromising owners and managers who openly take on the FA, refs decisions and FIFA, using all legal firepower at our disposal, then there would be the equivalent of the "Fergie hair drier " treatment nestling at the back of every refs mind when playing us, that is the difference in my mind, we have a history of not haranguing refs, and being respectful of the rules etc, when it comes to the big close decisions, refs don't bottle it and side with us like they did Fergie, they don't fear facing our managers, owners etc in the media, sad, but very true