Who would win this fight, and why?

Nala would win the fight because she can blend in with the environment and she is much faster when it comes to fighting another member of the cat family.

Tigress has trained in the Jade Palace for 20yrs and she has achieved the rank of the Master

Tigress,because she is trained

Nala, my reason is the same as ShereKhan88

Nala because she is awesome and fierce! :D

Nala becauzse I say so lol