How to use Matinee to make something to move in a perfect circle?

Hi, I’'ve been playing around with Matinee these past few days, and I couldn’t find a way to do something like the attachment.

In the picture, I’m moving the sphere from the position A to the position B to create a movement animation, but what I’m really after is for it to move following the curve, that is actually a quarter of a circle.

In other words, I’m looking for a way to move things in a circular fashion, and maybe if Matinee can interpolate the movement like that, would be great.