Victor Valdes is a free agent after leaving Barcelona this summer[GETTY]
Valdes is recovering from a cruciate knee injury that saw him end his trophy-laden spell at the Nou Camp on the sidelines.
He is not is expected to be fit until November, but Liverpool manager Brendan Rodgers is prepared to wait and put Valdes, 32, through a stringent medical.
Valdes can sign outside the transfer window because he is a free agent and would place enormous pressure on Mignolet, whose form has been inconsistent.
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