Sporting Lisbon football chief Augusto Inácio insists William Carvalho won't be sold on the cheap.
"There is one thing which does not run away, which is the clause. If they beat it, we cannot do anything. But it's not like the old days, when leading players left at any price," warned Inacio.
"And we are not concerned with William, nor with any other. If they (United and Chelsea) want him they will have to pay."
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