Crystal Palace centre-back Marc Guehi is now a primary target for the Italian club, while Bournemouth forward Antoine Semenyo holds a secret exit clause, and Chelsea are tracking young Portuguese prospect Cardoso Varela.
Serie A contenders Inter Milan are now part of the race to sign the services of Crystal Palace defender Marc Guehi, but Liverpool remain the frontrunners to sign the 25-year English international.
Bournemouth attacker Antoine Semenyo has included a buyout clause in his contract, but the club are holding it under wraps as they intend to retain the 25-year-old Ghanaian international, who has attracted interest from Tottenham and Manchester United.
Chelsea and Barcelona are both monitoring Dinamo Zagreb's 16-year Portuguese forward Cardoso Varela, bringing to the recruitment speculation around the emerging prospect.
Brighton are not looking to sell Cameroonian midfielder Carlos Baleba in the winter window, despite the 21-year-old drawing interest from Manchester United last summer.
Manchester United have positioned Crystal Palace and English midfielder Adam Wharton, 21-year-old, ahead of Baleba on their list of transfer targets.
Manchester United are considering renewing Brazilian midfielder Casemiro's contract beyond this season, but only if the 33-year accepts a salary reduction.
Interest in Casemiro has emerged from Brazilian clubs and Saudi Arabia, but Manchester United manager Ruben Amorim could argue for the ex- Real Madrid star to remain.
Barcelona shot-stopper Marc-Andre ter Stegen, 33, has emphasised that he has no plans to leave the team, even with interest from Manchester United and Newcastle United.
Crystal Palace full-back Daniel Munoz is desired by Barcelona, yet the club will refuse to let the 29-year Colombian international depart in the winter.
Ex- Tottenham football officer Scott Munn's choice to join Italian club Parma rather than Nottingham Forest is a further indication that boss Ange Postecoglou is on shaky ground at the City Ground.
New Newcastle sporting director Ross Wilson will lead an audit into the contract status of the club's key players, as the club look to prevent a repeat of the transfer drama that saw Swedish forward Alexander Isak, 26-year-old, join Liverpool.
Chelsea are not worried over the future of Ecuador midfielder Moises Caicedo, 23-year-old, after the public axing of his agent.
Caicedo is expected to be rewarded with a fresh deal by Chelsea to deter attention from Real Madrid.
Borussia Dortmund are keen on Barcelona's 17-year-old Spain youngster Guille Fernandez, who has yet to earn a first-team appearance with the Spanish club.
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