But in a shock twist Liverpool have put an end to the deal, the Liverpool Echo quote Besiktas president Fikret Orman as saying.
“Liverpool to not want him to go, the transfer can only go ahead with their say so there is nothing we can do right now," Orman revealed.
Lucas was thought to be heading through the Anfield exit door after a row with manager Brendan Rodgers before the opening game of the Premier League season this month.
Both Inter and AC Milan were reportedly keen on securing the player, while it is claimed Besiktas had a £3.5m bid for a permanent transfer rejected.
He was left out of the club's first two matches but returned for their 0-0 draw with Arsenal in midweek.
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