Chelsea are looking to make another massive long-term investment, with reports they are aggressively moving for 20-year-old RB Leipzig defender Josko Gvardiol in a deal that would cost £77.4million (€90m).

Gvardiol, who has 10 senior international caps for Croatia to his name, has established himself as one of the most exciting young defenders in Germany.

He has been linked to a host of elite clubs, but Chelsea appear to be at the front of the queue and would allow the centre-back to stay at Leipzig until next year.

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The Stamford Bridge club have made a number of big defensive signings in this window, with Kalidou Koulibaly and Marc Cucurella set to be followed by Wesley Fofana.

Koulibaly is 31, though, and has joined veteran Thiago Silva at the heart of the defence, explaining why Chelsea may already be looking at a succession plan.

Fabrizio Romano says the Blues are "in advanced talks" with Leipzig over a deal that would be completed now but only see Gvardiol make the move in 2023.

ROUND-UP

– PSV forward Cody Gakpo appears destined for the Premier League, with The Telegraph reporting Everton, Leeds United and Southampton are all interested in a player believed to be valued around £30m.

– The Telegraph has named a list of potential Fulham targets, including former Chelsea winger Willian, Paris Saint-Germain defender Layvin Kurzawa, Roma winger Justin Kluivert and Marseille forward Bamba Dieng. 

– The Daily Mail is reporting Brighton and Hove Albion are investigating a move for Billy Gilmour, although Chelsea's lack of depth in midfield could complicate matters.

– Aston Villa forward Douglas Luiz has some high-profile admirers, with Matheus Leal reporting Liverpool have submitted a £20m bid, and The Telegraph adds Atletico Madrid are also prepared to make the same offer.

– Leicester City are negotiating a deal for their potential Fofana replacement in 24-year-old Reims centre-back Wout Faes, believed to be worth £17.2m, according to the Daily Mail.

Manchester United have added yet another Ajax product to their wish-list for this transfer period, with 20-year-old striker Brian Brobbey emerging as a new target.

Brobbey came through the Ajax academy when Erik ten Hag was in charge and, after leaving to join RB Leipzig ahead of this past season, he was loaned back to Ajax in a successful move.

After returning to the Dutch giants, Brobbey scored seven goals in 11 Eredivisie fixtures, prompting the club to try and bring him back on a permanent deal.

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Brobbey was widely expected to re-join the reigning Eredivisie champions for a fee in the neighbourhood of £13million.

However, the Times is reporting that Ten Hag has caught wind of the move and is hoping to instead coax the promising young striker to Old Trafford.

It is said the deal with Ajax was almost as good as done, so it remains to be seen if he could be convinced to change directions at the 11th hour, but the Times report includes that Ten Hag has been on the phone to Brobbey in an effort to sway him towards the Premier League.

United's interest in Brobbey follows moves for Ajax stars Lisandro Martinez and Antony, with a package-deal for the pair rumoured to be worth north of £100m.

ROUND-UP

– According to French publication Media Foot, Arsenal are showing interest in 24-year-old Lyon midfielder Lucas Paqueta, who is also linked with Newcastle United.

– The Mirror is reporting that Barcelona manager Xavi is keen to re-sign Ousmane Dembele to a new contract, but the club's sporting director Mateu Alemany would prefer a move for Leeds United's Raphinha.

– Everton are targeting 20-year-old Chelsea striker Armando Broja and 25-year-old Southampton full-back Kyle Walker-Peters, according to The Mirror.

– Fabrizio Romano claims Chelsea have reached personal terms with Manchester City centre-back Nathan Ake, although the final transfer fee, believed to be in the £40m range, is yet to be decided.

– Gazzetta dello Sport is reporting that West Ham are considering a £13m move for 23-year-old Roma forward Justin Kluivert, while Goal claims Villarreal winger Arnaut Danjuma told the Hammers he has no interest in moving there.

Justin Kluivert was sorely missed by RB Leipzig against Liverpool and his injuries are increasingly frustrating head coach Julian Nagelsmann.

Winger Kluivert joined Leipzig from Roma on a season-long loan at the start of the 2020-21 campaign.

However, the 21-year-old - son of former Barcelona striker Patrick - has so far been limited to just three starts and 452 minutes of action in a Leipzig shirt across all competitions.

An ankle issue has provided Kluivert's latest setback, with his last appearance coming in January and his last start before Christmas.

Prior to being named in the line-up against Werder Bremen on December 12, Kluivert had scored in consecutive matches against Bayern Munich and Manchester United - his only goals so far this season.

Nagelsmann was impressed by the Netherlands international's performances in those games and believes his dribbling ability could be a real asset; he leads Leipzig with 5.4 dribbles attempted and 2.6 completed per 90 minutes this term.

But the coach was again without Kluivert as Leipzig lost their Champions League first leg 2-0 against Liverpool on Tuesday, with the German team attempting just 11 dribbles and failing to execute a single fast break.

"At the stage when we played Bayern and Manchester [United], it was the Justin we were hoping for," Nagelsmann said. "After that, he was gone again.

"He just trains very little, I don't see him much in training. That's the problem. He has to become more stable in terms of his body.

"Since he's been here, he's had far too few training sessions and therefore too little impact on the game.

"He basically has skills that would have done us good in the game against Liverpool. They would also do us good in the Bundesliga, like his deep runs and fast dribbling. He's also a goalscorer and has a good finish.

"But he simply has to become more stable. He's a little too injury-prone these days."

Leipzig would reportedly have to pay in excess of €10million to make Kluivert's move permanent.

Nagelsmann is not ruling out the possibility but would like to see more from the player over the coming months, referring again to the standard set in a 3-3 draw with Bayern.

Kluivert scored with his only shot at Allianz Arena, playing 78 minutes after being named in Nagelsmann's starting line-up.

"Obviously, we hope he has an even bigger impact on a successful season, that he stays healthy and that he can train more and get fit again for the games," Nagelsmann added.

"He's welcome to do as well as he did against Bayern Munich.

"In the course of the second half of the season, we will then decide what we do and what he wants to do. And how big his influence was and how it then continues beyond the summer or not, we will decide then."