Ex heavyweight Champion Vitali Klitschko has insisted that his brother Wladimir Klitschko can’t be defeated when he is at his best.
Anthony Joshua will battle the younger Klitschko in a scheduled match to hold in Wembley on Saturday.
Joshua has been tipped favourite for the fight by the bookmarkers but Vitali believes his brother would go on to win if he is 100%
The 45-year-old told BBC Radio 5 live: “Nobody is perfect. Everyone has strong sides and weak sides. Wladimir’s weak side is his concentration.
“That cost him the title against Fury. I’ve never seen him focused like this. If he is concentrating 100%, Joshua does not have a chance. Wladimir understands this is the fight of his life.”
Vitali is considered to be one of the greatest heavyweights of all time.