After a brilliant flash of light knocks out her vision and she finds herself physically transported through space and time, Saber opens her eyes to find herself standing in a summoning circle... in front of her, which she presumes that it is the Master who summoned her to this. location.

Let me ask. You are my teacher? She looks at her Master with an intense gaze, as if she was determining whether or not this Magus is worthy of being summoned as her Servant.