Where does this "invading her space" concept come from? Certainly not the rulebook. A player doesn't own any space other than what she occupies. The only way that a defender could invade her space and commit a foul would be to shove her and displace her. A defender who is merely in contact with the offensive player but does not shove her commits no foul. And a defender who anticipates where the offensive player will want to pivot and occupies that space first is simply playing good defense. The offensive player can deal with that by pivoting the other way, if she is athletic enough to do that without traveling.
But getting up under a player so they can’t plant their feet or bodying a player so they can’t make a move is the issue. That’s like saying undercutting isn’t in the rule book because the player left the floor and doesn’t own that court space to land anymore. Part of it came more with that “freedom of movement” emphasis a few years ago. You must give players room to move or it basically implies too much physical contact.
