Xabi Alonso and Ruben Amorim are two of the managers who find themselves among the favourites to take over from Jurgen Klopp at Liverpool.
Both managers have found success deploying a specific system at Bayer Leverkusen and Sporting CP respectively, with both sides top of their domestic leagues.
Indeed, both managers favour fielding three at the back as they look to strike a balance between attacking threat and defensive solidity.
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And if either manager decides to stick to their system following their appointment then Liverpool will likely need to dip into the transfer market for defensive recruitments.
With Joel Matip departing Anfield after seven seasons at the club, that leaves the Reds with only three senior centre-backs.
Jarell Quansah has emerged this season to compete alongside Van Dijk and Konate with Joe Gomez' resurgence back into the side has come predominantly from left-back.
Sepp Van den Berg has spoken of his desire to stake a place in the Liverpool back-line following his performances on-loan at Mainz, and data collected by Comparisonator rank him amongst Europe's top centre-backs based on performances this season.
The Dutch centre-back could find himself in contention at Anfield in a new look defensive structure.
Liverpool have been linked with Goncalo Inacio, Marc Guehi and Tosin Adarabioyo with his contract at Fulham expiring at the end of the season.
Meanwhile, further up the pitch, Alonso sets his Leverkusen side up with two attacking midfielders behind the central striker.
The aim is to create overloads in the centre of the pitch to allow
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