computer player movement help

Hello All,
I have started making a bat and ball type game where you hit a ball and a computer player gets it. What I want to know is the angle of the shortest path from the point of the player to the path of the ball (I found out tha it will be perpendicular to the path of the ball).
The things that I know is the angle of what the ball is travelling and the point of the player.
Any help is greatly appreciated. Thankyou all so much.

If I'm understanding your question correctly you need the angle of the computer player in reference to a horizontal line to hit the path of the ball perpendicularly.

It should be simple 90-the angle of the ball.

If the ball strikes the path perpendicularly it forms a right angle triangle.

I realise that but if you put the fielder over the other side of the path then it will only be moving away from it.