Selhurst Park centre-back Marc Guehi is now a key objective for Inter, while Bournemouth forward Antoine Semenyo has a confidential exit clause, and the Blues are keen on Portuguese prospect Cardoso Varela.
Italian powerhouse Inter Milan have entered the race to secure the signature of Crystal Palace centre-back Marc Guehi, though Liverpool continue to be the leading candidates to sign the 25-year-old England international.
Bournemouth attacker Antoine Semenyo possesses a buyout clause in his deal, but the club are maintaining it private as they aim to hold onto the 25-year Ghanaian player, who has attracted interest from Tottenham and Manchester United.
Chelsea and Barcelona are each watching Dinamo Zagreb's 16-year-old Portugal forward Cardoso Varela, adding to the recruitment rumours around the young talent.
Brighton are not looking to cash in on Cameroon midfielder Carlos Baleba in the winter window, even though the 21-year-old drawing interest from Manchester United during the previous window.
Manchester United have positioned Crystal Palace and England player Adam Wharton, 21, ahead of Baleba on their shortlist of transfer targets.
Manchester United are evaluating extending Brazil star Casemiro's contract beyond this campaign, however only if the 33-year accepts a wage cut.
Interest in Casemiro has emerged from Brazil and Saudi clubs, yet Manchester United manager Ruben Amorim could argue for the ex- Real Madrid star to remain.
Barcelona goalkeeper Marc-Andre ter Stegen, 33, has made it clear that he does not intend to leave the team, despite interest from Manchester United and Newcastle United.
Crystal Palace defender Daniel Munoz is desired by Barcelona, but the Eagles will refuse to let the 29-year Colombian international depart in the winter.
Ex- Tottenham chief Scott Munn's choice to join Serie A club Parma rather than Nottingham Forest is a further sign that manager Ange Postecoglou is on uncertain ground at the City Ground.
New Newcastle sporting director Ross Wilson will oversee an review into the contract situation of the club's top players, as the club look to prevent a repeat of the player drama that saw Swedish striker Alexander Isak, 26-year-old, join Liverpool.
Chelsea are not worried over the future of Ecuadorian midfielder Moises Caicedo, 23-year-old, following the very visible dismissal of his agent.
The midfielder is expected to be rewarded with a fresh deal by Chelsea to deter attention from Real Madrid.
Borussia Dortmund are interested in Barcelona's 17-year Spain youngster Guille Fernandez, who has not yet make a first-team appearance with the Catalan club.
Lena is a tech journalist with over a decade of experience covering consumer electronics and emerging technologies.