UFC middleweight contender Brendan Allen is back in the gym gearing up for what hopefully will be a productive 2026 ... and while he has his sights set on former champ Dricus Du Plessis -- he tells TMZ Sports he's getting mixed signals from the Australian!!
We caught up with Allen a few months after he defeated Reinier de Ridder in Vancouver, and he told us he's hopeful a showdown with Du Plessis will be made sometime in the New Year.

But while that's his desire .