Boxing ****yst Steve Bunce on BBC Radio 5 live: "It has turned nasty and sour. There is some concern inside the Fury camp. They went to the ring and apparently it's like standing on a mattress. They say the Klitschko camp have inserted three layers of foam under the canvas - it's like walking through quicksand. "I believe they've done this because they will have seen a lot of footage of Fury being incredibly mobile, and of course his plan tonight will be to be very mobile and make Klitschko chase him. "At the moment an impasse has been reached and they are in negotiations. The promoters are arguing it out. This is quite a serious problem, because it absolutely nullifies most of what Tyson Fury has prepared for."