I can’t imagine Reigns losing this match. He has the advantage against Rusev in every category. By submission is the only way Rusev can win this match, but getting him in The Accolade, BUT Reigns has powered his way out of it before.
Rusev is too slow to combat Reigns and doesn’t have a quick signature to turn the momentum. I see Reigns walking out of this match the United States Champion easily.