Crystal Palace centre-back Marc Guehi has become a primary target for the Italian club, while the Cherries forward Antoine Semenyo has a undisclosed exit clause, and the Blues are tracking young Portuguese prospect Cardoso Varela.
Serie A contenders Inter Milan have joined the competition to sign the services of Crystal Palace centre-back Marc Guehi, though Liverpool are still the leading candidates to sign the 25-year England star.
Bournemouth forward Antoine Semenyo possesses a release clause in his deal, however the team are holding it confidential as they intend to retain the 25-year Ghana international, who has been linked from Tottenham and Manchester United.
Chelsea and Barcelona are each monitoring Dinamo Zagreb's 16-year Portuguese striker Cardoso Varela, adding to the transfer rumours around the young prospect.
Brighton do not plan to cash in on Cameroonian midfielder Carlos Baleba in the winter window, despite the 21-year attracting interest from Manchester United during the previous window.
Manchester United have positioned Crystal Palace and England midfielder Adam Wharton, 21-year-old, ahead of Baleba on their list of recruitment objectives.
Manchester United are evaluating renewing Brazilian midfielder Casemiro's contract beyond this season, but only if the 33-year-old agrees to a salary reduction.
Attention in Casemiro has emerged from Brazilian clubs and Saudi clubs, but Manchester United manager Ruben Amorim may make a case for the ex- Real Madrid player to stay.
Barcelona goalkeeper Marc-Andre ter Stegen, 33, has stated that he does not intend to depart the team, even with interest from Manchester United and Newcastle United.
Crystal Palace full-back Daniel Munoz is desired by Barcelona, but the Eagles will not allow the 29-year-old Colombian player depart in January.
Former Tottenham football officer Scott Munn's decision to take a role at Serie A side Parma instead of Nottingham Forest is a further indication that boss Ange Postecoglou is on uncertain footing at the club.
New Newcastle recruitment chief Ross Wilson will oversee an audit into the deal situation of the club's key players, as the club aim to avoid a recurrence of the player saga that saw Sweden striker Alexander Isak, 26-year-old, join Liverpool.
Chelsea have no concern over the long-term of Ecuadorian midfielder Moises Caicedo, 23-year-old, following the very visible dismissal of his representative.
Caicedo is set to be offered with a fresh deal by Chelsea to deter interest from Real Madrid.
Borussia Dortmund are interested in Barcelona's 17-year Spain midfielder Guille Fernandez, who has yet to earn a senior appearance with the Catalan club.