If a fair fly ball is deflected over a fence into foul territory what is the call?

If the ball first lands in foul territory, then it is a foul ball. If the ball lands in fiar territory and rolls into the foul territory after first base, it's a fair ball. - So, if the ball is in the air in fair territory and drifts to foul after first base still in the air, makes first contact with the ground in foul territory, it's a foul ball.