The Nigeria midfielder has questioned his position at the club.
Bruce told the Hull Daily Mail: "I have to try and tell him he's not quite there. I try to be honest with all of them, but I think most people would say the same thing.
"Sone is a big part of what we're doing here, but I've not seen the real him until he came off the bench last weekend. He looked to have all his movement back and made a great impact.
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