|Ignore the Play arrow from this screen capture. If you want to see|
the full video, click here. Inside the yellow cones is the
Black Hole. No bueno!
As for which part of the court is marked off, in the video, the goal was to return the ball deep, behind the halfway point of the back court (midway between the service line and the baseline) as well as in the 2-3 foot 'alley' adjacent to the singles sideline. So ideally the returner is returning deep cross court, or deep down the line. Even in the middle of the court is okay as long as it is deep. This may be too challenging for younger players, so consider asking them to aim for a large square deep and cross court, or just anywhere deep.