He tweeted: "Valencia considering offers from City and United. None reaches €50m of buy out clause. Spanish club resigned he will go to the PL."
Spanish publication SillasGol reported earlier in the week that the Valencia star was closing in on a move to England with United claimed to be his preferred destination.
Despite keeping a clean sheet on the opening weekend of the Premier League against West Brom, Manuel Pellegrini is understood to be keen on strengthening his defence with concerns of Vincent Kompany's fitness.
While United appear to have missed out on signing Sergio Ramos with Spaniard set to sign a new five-year contract with Real Madrid.
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