Liverpool currently sit atop the Premier League table having suffered zero losses this season. Over the past year, Jurgen Klopp has transformed Liverpool into what many believe to be the best team in the world.
They're miles ahead of every other team in the Premier League and possibly even in Europe.
Liverpool pretty much already have the league title in the bag after an incredible first half of the season, but going into the second half of the league campaign, the Reds need to bolster their squad depth in a bid to prevent their first-team players from feeling fatigue due to their high intensity style of play.
Klopp would benefit a great deal from bolstering their squad depth in defence, midfield and on the wings, and here's a look at players they could sign on that front:
Liverpool have the best defence in the Premier League. Klopp's preferred defensive lineup of Andrew Robertson, Virgil Van Dijk, Joe Gomez and Alexander-Arnold have proven to be an elite quartet having conceded just 14 goals throughout the first half of the season.
At this point, Liverpool aren't particularly in need of any defensive upgrades, however, Klopp is reportedly keen on signing 18-year-old Toulouse left-back Mathieu Goncalves who is regarded as one of the best young talents in the Ligue 1.
Despite being just 18 years old, Goncalves possesses impressive defensive awareness which allows him to accurately assess defensive situations and act accordingly.
Should Liverpool sign him, Goncalves would be able to offer the Reds some squad depth as he continues his development under Jurgen Klopp. He'd be a signing for the future rather than one expected to come into the squad to make an immediate impact.
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Kai Havertz is probably the best young player capable of performing that role for Liverpool on a consistent basis due to his expansive skillset.
Adept at using both feet, the young German boasts of a Kevin De Bruyne esque passing range, great ball control, stamina and incredible speed of thought - it's no secret why he's currently one of the most sought-after midfielders in Europe.
Havertz would introduce a new dynamic to Liverpool's midfield set-up, one the Premier League might not be able to handle.
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As long as Mane and Mohamed Salah are fit then they will start every single game for Liverpool - that much is certain - however, in the event one of them gets injured or is in need of a rest Jurgen Klopp will need to replace either of the pair with a player capable of putting up an impressive showing when called upon.
That player, at the moment is Xherdan Shaqiri, but he's expected to leave the club in January due to his bit-part role - on that note, Liverpool could make a move for Bournemouth's Ryan Fraser who has established himself as a quality winger in the Premier League over the past few seasons.
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