The Master heard the disturbance outside. Hard not to, as it was sort of happening in his backyard. A few seconds later he was out the door, assuming that the Doctor had pissed off a duck or something.

Ah, that charming girl. She seemed to be having it out with another fellow of exceptional... talents.

Interesting.

The Master stood by at a safe(ish) distance and ate jelly babies, smiling to himself and enjoying the show.