However , the dynamic will be different when the fighters walk to the Octagon at T - Mobile Arena in Las Vegas .
That 's when Rousey will have to do something for the first time in her illustrious UFC career .
However , the dynamic will be different when the fighters walk to the Octagon at T - Mobile Arena in Las Vegas because that 's when Rousey will have to do something for the first time in her illustrious UFC career .