Mohamed Salah's arrival on Merseyside changed Liverpool some years ago.

The Egyptian steered Jurgen Klopp away from 4-2-3-1 upon his signature in 2017 due to how his skills perfectly blended with those of Sadio Mane and Roberto Firmino.

The Reds boss had previously chased a no.10 in the transfer market, but Salah's addition meant that Klopp had three top offensive talents at his disposal; Firmino was to be deployed through the middle as a false nine while Salah and Mane operated as inside forwards from the right and the left, often cutting inside before finding the net.

4-2-3-1 has still been used sporadically but ultimately, the Liverpool squad has been constructed to execute 4-3-3 from week to week.

It remains to be seen how the squad will be shaped moving forward, but it is reasonable to suggest that hints towards 4-2-3-1 are beginning to emerge as Klopp begins to construct another title charge.

Amongst the players linked with a move to Anfield, Florian Neuhaus is one of the most prominent, with the German midfielder currently representing his national team at Euro 2020.

The Borussia Monchengladbach man is heavily tipped for a transfer this summer after a strong Bundesliga campaign, and he's still aged just 24.

A midfield spot has opened up on the back of Gini Wijnaldum's departure to Paris Saint-Germain, but it is notable that Neuhaus has spent virtually the whole season as part of a midfield pairing rather than a trio.

4-2-3-1 and 4-4-2 have been the most used formations by Gladbach this season, with Neuhaus usually fielded on the left side of a two, behind his team's no.10.

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If Liverpool were to move for him, his capture would fit with a wider theme after Thiago Alcantara made the switch from Bayern Munich last year.

The Spaniard has fulfilled a variety of different roles since his move to Anfield, but he was accustomed to 4-2-3-1 while in Bundesliga having been paired with Leon Goretza more often than not.

Even Fabinho - who joined in 2018 - was previously used to playing as a part of a duo while at AS Monaco, although he's managed to adapt under Klopp.

The Brazilian needed time to adjust to playing in a three - barely featuring before the winter in his first season - and Neuhaus could do the same, but the Reds' development appears interesting.

If Neuhaus was to join, Klopp would quietly have three midfielders in his team who have midfield pairing roots, which could be enough for him to consider mixing things up ahead of the new season.

The clues are subtle, but perhaps a change in shape is on the cards?