User blog comment:Jkphantom9/RWBY clip on Lazer Team Livestream/@comment-11188061-20140622040640/@comment-3257939-20140622115559

I don't think it's safe to call it a defeat from Pyrrha. It's only a defeat if her aura reaches the red zone and Pyrrha can pull back her sword with her semblance.

Since she's the four year champion and a main character, unless being defeated it's part of her "arc", it's safe to assume that she'll win against Mercury.