He's not admitting anything. He wants Rios and doesn't think Rios deserves a Pac shot. Bradley still regards Pac as one of the best, and since he can't fight Pac why not be the door Rios has to go through to get Pac and maybe when Bradley wins he gets his rematch.
But in no way does that quote indirectly indicate Bradley thinks he loss. He understands what the Public and his Promoter thinks but Bradley believes he won.