Englishman only has 18 months left to run on his present deal at Upton Park.
West Ham United have told London rivals Fulham that they will need to double their initial offer of £4m if they still want to be able to sign midfielder Ravel Morrison in the January transfer window, according to reports in the Daily Mirror.
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The Hammers are understood to be furious with new Cottagers head coach Rene Meulensteen after the Dutchman claimed earlier in the week that the England Under-21 international wanted to move to Craven Cottage this month.
“We have received a complaint from West Ham regarding certain comments made by a Fulham official and we are currently looking into the matter,” said a Premier League statement.