Hi, Rusty!
No, I don't think you are bring picky.
If one tennis player is referred to by his Christian name, then it is only polite to extend the same courtesy to his opponent.
Although having said that and thinking back to the verbal commentaries at Wimbledon, for instance, the commentator there will sometimes call one of the players by his forename - especially if it is a friend of his; or a well-known player- and then refer to the other player by his surname.
But this does not make it right.......
I agree with you that the address should be the same for each player.
On a more mundane note...... we are having fish and chips (well, I'm having sausages!) from the chip shop for our dinner!
Sounds good?