Liverpool are still “actively” in the market for a new centre-back this summer and they have three key qualities they are seeking for the position.Joe Gomez‘s early return to Liverpool with an Achilles injury brought the club’s needs at centre-back back into focus having seen the club focus elsewhere in the transfer window.Currently, Arne Slot has only Virgil van Dijk and Ibrahima Konate as his two fit specialist options on tour after Jarell Quansah left for Bayer Leverkusen at the start of July.• READ: Newcastle expecting Liverpool’s “formal offer” for Isak THIS weekMarc Guehi is a primary target but Liverpool “are unlikely to be drawn into a saga” with Crystal Palace over their lofty demands for a player who is out of contract next summer, as per the Times‘ Paul Joyce.According to the Mail‘s Lewis Steele, Liverpool are still “actively targeting centre-backs to boost their squad,” but currently “nothing is advanced.”• READ: Guehi: What Liverpool could sign – progressive passer and duel-winnerLiverpool’s “main brief,” though, is a centre-back who is “young, adept on the ball and who could learn from Van Dijk and eventually evolve into his long-term replacement.”You can, therefore, see why Guehi, 25, fits the bill as he is entering his prime years and has proved himself as a progressive, ball-playing centre-back who relishes one-on-one duels.He is not as proficient in the air as Van Dijk or Liverpool’s other senior centre-backs, but that is not to say he cannot learn from the club captain.In recent years, the club had been monitoring Levi Colwill, Leny Yoro and Dean Huijsen but each elected to go elsewhere – they do, however, represent the profile Liverpool want. To that end, the club have recently been linked to Toulouse’s Charlie Cresswell and Parma’s Giovanni Leoni, while Jorrel Hato had been touted but is now closing in on a move to Chelsea.Liverpool fans will know all too well what shortages at the back can lead to and seeing Ryan Gravenberch and Kostas Tsimikas fill in against AC Milan offered an untimely reminder.Although Alexander Isak remains the headline target, Richard Hughes will not be neglecting the defence as he helps make the squad in Arne Slot‘s image for an assault on all competitions.