The midfielder is back in the first team after manager Harry Redknapp's resignation.
Hill told Get West London: He's showed up in training and worked hard whenever he's needed. When he's had to, he's worked.
"To get the most out of him, the more he plays the better he gets.
"Listen, He could be whatever he wants to be," said Hill. "People have mentioned his attitude and all that stuff. Since he's come in, he's done well."
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