And according to French outlet Le10 Sport, Liverpool have now approached Sissoko directly to discuss a move to Anfield.
The report adds Borussia Dortmund have also approached the Frenchman, but the Bundesliga club are unlikely to be able to meet Newcastle's £35m asking price.
Liverpool boss Jurgen Klopp has already made a number of signings during his first summer at Anfield.
Sadio Mane has arrived for £30million for Southampton while Ragnar Klavan, Loris Karius, and Alex Manninger have also joined.
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