Judging by what I saw on MOTD last night I think bmb's analysis is spot on. May I also say in passing how very refreshing it is to read a poster who is entirely objective even when it comes to offering criticism about the players of one's own team. It shows a degree of honesty and candour which should be a model for all who contribute to this site.
Richarlison's RC was nailed on. I suspect he was reacting to provocation but that cannot condone what he did. I thought the second RC was extremely harsh but perhaps justice was served in the overall scheme of things.
Very good to see Probert back refereeing in the PL, and although his running style does not betoken super fitness, having passed the Fitness Test then clearly he is fit enough.