Here is an example (with slow moving players for clarity) to show how a team with high pressing might work. This case shows a team that tries to press with three players at all times (the pressing is not initiated until a blue team player starts dribbling).
Pressing players are highlighted with a blue spot, their "intelligent" interception target is shown by a red circle.
The intercept algorithm has the nice side effect that different pressing players seem to work together and don't all just head for the ball - they head for where they think the ball will be when they get there - therefore you can see the red target circles kind of "covering" for each other.
For testing, the attacking player has been given perfect dribbling, and the pressing players don't tackle.