Boro's Reason For Letting Viduka Go
Gibson: "We spoke to Mark and his agent last Christmas and I was told very early on it was about money and that Mark would go to the highest bidder.
"The wages went up by many millions and I felt almost tainted by it.
"I took it to the point where I felt so uncomfortable that it was almost a relief when he went to Newcastle because of the sums involved.
"Mark Viduka is 32 on his next birthday and he was asking for a three-year contract and asking for a figure which, over a year, would to equate to over half of our gate income."
Gibson accused Yakubu of "stopping playing for us halfway through last season". Yakubu's £11.25million departure for Everton will be confirmed if his work-permit appeal is successful on Wednesday.