Interestingly, on tennis courts you have the “deuce” side, which is to the right of the player, and the “ad” side, which is to the left of the player. Because y

Interestingly, on tennis courts you have the “deuce” side, which is to the right of the player, and the “ad” side, which is to the left of the player. Because you have two players facing each other, the deuce sides for each player are diagonally opposite from a neutral observer’s perspective.