Liverpool have moved to deny reports that they have sealed a permanent deal for midfielder Javier Mascherano.But, it is understood that terms have been agreed on a four-year deal, which is expected to be ratified next week. The deal is expected to come into force in June, when the loan deal for the player expires. Liverpool do not have to pay for the Argentinian player immediately because the Anfield club already hold his registration. It had been claimed this evening that the Reds had agreed to pay £18.6million for the Argentina international who has been on loan at Anfield for a year. But a statement on the club's website insisted: 'Contrary to reports elsewhere, the deal to complete Javier Mascherano's permanent move to Liverpool has yet to be finalised.'