I have tried this double tatic successfully. It is almost unstoppable, except for an expert lobber. The server serves and takes the place of the net man and the net man crosses after the bounce of the ball in the service box (he is invisible until the ball hits the racket, every tennis player has to look at where the ball bounces) . During the cross, the players cover the center with the zig zag. All that is left is the down the line and the cross both shown as shaded areas in the picture above. If they can hit these areas, they deserve the point!!!
