Jürgen Klopp has built his Liverpool 2.0 from the front. Starting out with his attackers in a gradual process over the course of 12 months, he underwent a more radical and sudden overhaul in midfield over the course of the summer. Now the attention turns to the defense.

It's an obvious next step in the evolution of Liverpool. The club's key defensive options in Virgil van Dijk and Joël Matip, who both started the game against Manchester City, are not getting any younger. Both are set to turn 33 next year, and in the case of Matip he now has about six months left on his current contract, which expires at the end of the season.

Whether Matip will stay or move to pastures new remains to be seen, but it's clear Klopp needs to rejuvenate his options, even if the emergence of Jarell Quansah has at least alleviated some of the Liverpool boss' problems. The natural step of course is for Liverpool to enter the transfer market next summer, and that means the club may already be monitoring potential arrivals ahead of the window.

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Murillo is one possible solution who Liverpool should consider. Already attracting plenty of interest in the Premier League for Nottingham Forest, the 21-year-old left-footed defender signed this summer from Corinthians. The Brazilian made a name for himself there as one of the best up and coming young defenders in the league.

And he's done the same since coming into Forest as well, having started the club's last seven matches — including a game against Liverpool.. Quick and really comfortable on the ball, Murillo reads the game well, and he is not afraid to put in a well-timed crunching tackle. His recent last-ditch intervention against Brighton as his Brazilian compatriot João Pedro looked to escape was very much Van-Dijk-esque in nature.

Liverpool needs a left-footed center-back to provide cover for the club captain, and Murillo would make sense. He's got the speed to play in a high line and on top of that the physical traits needed to be a top defender. But crucially he is an ideal player for Klopp because of his ability on the ball.

As per FBref he ranks in the 93rd percentile among his positional peers for progressive carries (1.61 per 90) and in the 99th percentile for successful take-ons (1.32 per 90). His sample size of seven games means it's still early days, but it's clear that he is someone to keep an eye on who has the kind of traits that Liverpool looks for when scouting center-backs. That's why the club should monitor him in the next few months ahead of the summer transfer window.