His body has changed. Why not just agree to testing and silence the doubters? It's not just Wilder that is suspicious of Povetkin. It's pretty widely spread suspicion similar to the suspicion of Manny.

I just know you can go back as far as Tyson asking Holyfield for OST and Holyfield refusing and it seems to always be fans accusing the guy asking for testing of ducking. But knowing Holyfield was a steroid cheat should make people take pause.

He can't get out of the fight if Povetkin simply agrees so....