Former Liverpool defender Andrea Dossena says they should move for Napoli centre-half Kalidou Koulibaly.
Dossena, now 38, played for Liverpool between 2008-10 and made the switch in the opposite direction from Anfield to the San Paolo.
He told Radio Musica TV: "If the league resumes, Napoli will hardly qualify for the next Champions League, so the Neapolitan club will be forced to give up some important players – the most eligible are Fabian [Ruiz] and Koulibaly.
"[Jurgen] Klopp is missing just one piece to complete a stratospheric squad and the Koulibaly-Van Dijk pairing could become a big barrier.
"Also, Liverpool have no economic problems and therefore the deal would be within the reach of the English club."