Off contract in June, Wilson proved Saturday's matchwinner against Brighton.
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In the aftermath, Silva stated: “We are in the fight, we are trying to keep him. If you ask me if it’s going to be easy, I say it’s not going to be easy.
“The more he scores, many more clubs are going to be around him. This is football business. When a player goes to the end of his contract, this kind of thing is going to happen.
“I know he’s happy in our club and how much he’s enjoying the moment. It’s up to the club to do the maximum to keep him.”