You can play Tennis Masters in a99.io as unblocked.
Tennis Masters game, which will be among the games I will prefer as the game you can play for 2 players, is similar to the Head Ball game, which is the same two player football game. 1. Player can move with W, A, D keys. You can hit with V and B keys. 2. Player can move with the arrow keys. You can hit with L and K keys.