I see only one way - to build a doubly degenerate torus, that is, a torus whose inner circle is pulled together to the south pole of the sphere, and the outer circle to the north pole. With such a degeneration of the torus, its pairs of circles formed by the section of the torus by the planes intersecting its boundary circles stick together into one circle. There may be other ways, but they are not known to me. I will be glad to receive any comment from you on this topic.