Danny Green has applauded Jai Opetaia's decision to fight Deontay Wilder at heavyweight even if the former world champion still possesses a right hand that could "knock over a tank".
The unbeaten Australian (31-0) will step up from cruiserweight to face the former WBC champion (45-4-1) 10 years his senior, who had lost four of his last five fights before back-to-back wins in the past year.
