3 mods:
Rk-MMA
Sumore_v
erthtkv2.tbm

say it's pouffywall vs Grim

I decide i'm not very good at sumore so I eliminate it.
Now say you hate taekkyon and erthtk so you eliminate that.

Then we play first to 3 wins(3-2 is the max score and 3-0 is min) in the mod not eliminated which in this case is Rk-mma.tbm.