I think it's a British man in his forties/firfties, judging by the cultural references and general tone, sense of humour. Also someone fluent in French, aware of the goings on behind the scenes at the various tournaments and what people gossip about, and a good writer. IMO, it's a sports journalist. Perhaps someone who has sat through a few nauseating Fed press conferences.
I agree with much of that. I don't get the impression that he is actually at most of the tournaments, so I'm not sure about a journalist. There were photos and comments that made it clear he was at Wimbledon last year - saw Neil Harman, was recognised by Judy, was at Court 18(?) watching Jamie Baker. He does seem to follow some of the other Brits - like Oli Golding
I had a ticket to the Evening of Sport with Ross Hutchins and others back in March, but it was cancelled. The question I wanted to ask Ross, with just a yes or no answer, was whether he knew who PseudoFed is. I don't want to know who he is, but would like to have seen the reaction.