Multiplayer Pong Game

I am working on multiplayer version of Pong game. As plugin I am using AppWarp. At present in game I can able to establish connection between two players and able to move their respective paddle.

But now I am stuck at ball movement. For multiplayer game how to handle ball movement in both player screen. That I can't able to understand. Only idea become enough for me, all other things I can handle my self. Please give some suggestion in this.