Selhurst Park centre-back Marc Guehi has become a key objective for Inter, while the Cherries striker Antoine Semenyo holds a confidential buyout clause, and the Blues are tracking Portuguese teenager Cardoso Varela.
Italian powerhouse Inter Milan have entered the competition to secure the signature of Crystal Palace centre-back Marc Guehi, but Liverpool continue to be the favourites to sign the 25-year-old English international.
Bournemouth attacker Antoine Semenyo has included a release clause in his deal, but the team are holding it under wraps as they intend to keep the 25-year-old Ghanaian player, who has been linked from Tottenham and Manchester United.
Chelsea and Barcelona are both tracking Dinamo Zagreb's 16-year Portugal striker Cardoso Varela, adding to the transfer rumours around the young talent.
Brighton are not looking to sell Cameroonian midfielder Carlos Baleba in January, despite the 21-year attracting attention from Manchester United during the previous window.
Manchester United have placed Crystal Palace and England player Adam Wharton, 21-year-old, ahead of Baleba on their list of recruitment objectives.
Manchester United are considering renewing Brazilian midfielder Casemiro's contract past this season, however only if the 33-year agrees to a salary cut.
Attention in Casemiro has come from Brazil and Saudi Arabia, but Manchester United boss Ruben Amorim may make a case for the ex- Real Madrid star to remain.
Barcelona shot-stopper Marc-Andre ter Stegen, 33-year-old, has made it clear that he does not intend to depart the club, despite interest from Manchester United and Newcastle United.
Crystal Palace full-back Daniel Munoz is desired by Barcelona, but the Eagles will refuse to let the 29-year-old Colombian player leave in the winter.
Ex- Tottenham chief Scott Munn's choice to take a role at Italian club Parma rather than Nottingham Forest is a further indication that manager Ange Postecoglou is on uncertain footing at the club.
Recently appointed Newcastle sporting director Ross Wilson will lead an audit into the deal status of the team's top players, as the club aim to avoid a repeat of the player drama that saw Sweden striker Alexander Isak, 26, join Liverpool.
Chelsea are not worried over the future of Ecuador talent Moises Caicedo, 23, after the very visible axing of his representative.
The midfielder is set to be offered with a fresh deal by Chelsea to deter attention from Real Madrid.
Borussia Dortmund are interested in Barcelona's 17-year-old Spanish youngster Guille Fernandez, who has yet to earn a senior appearance with the Catalan side.