Halsey could be a key player in the January transfer window, with several stars being tipped as both outgoing and incoming.
Antonio Rudiger, Cesar Azpilicueta and Andreas Christensen have been out of contract over the summer, prompting the club to try and move on with new deals or potentially hasty cash-ins for defenders.
In terms of incoming, it is set to be relatively quiet, but an injury to Ben Chilwell’s left side could open up a spot for Lucas Digne to sign or Emerson Palmieri to return from a loan at Lyon.
France international Aurelian Tchoumnei is also being monitored as a long-term target and, of course, to compete with the latest Romelu Lukaku news.
Lukaku had put his Chelsea future in doubt after he aired his disappointment with the club in an interview released ahead of the game against Liverpool.
Dropped for that match, Tottenham were linked in a shocking move to the Belgian, who have since apologized publicly.
Thomas Tuchel outlines a plan to internally discipline the striker, who is set to be fine, but has welcomed his return to the team with open arms to put the episode behind him.
Monaco has recently welcomed some new visitors in the form of Chelsea scouts, who are “deeply” looking at midfielder Tchoumeni ahead of a possible bid.
The 21-year-old has been called by goal a long-term target for the Blues, who have also been linked with Arsenal.
Chelsea are delving into factors including not only Tchoumeni’s on-pitch record, but also his attitude and personal life before starting a move this month or summer.
Everton’s Lucas Digne is reportedly in favor of moving to Chelsea this month, despite links with a move to West Ham or Newcastle United.
However, it remains to be seen whether European champions will act on the pest.
With Chilwell for the season, Chelsea are looking at their left-back options and the club are in discussion with the recall of Italy international Emerson from Lyon.
However, Le10Sport claims that the approach of a recall by the English side has been rejected by their French counterparts.
Everton defender Lucas Digne is known as another option, but Newcastle and West Ham have been named as set-piece specialists.
Real Madrid, Juventus, Paris Saint-Germain and Bayern Munich have all been tipped to hold talks with the defender over a free transfer in the summer, which could be pre-agreed in January.
However, Madrid are said to have pulled out of the race after Marca made initial contact with his team.
Rudiger’s salary demands top £200,000 a week, it is claimed, leaving Los Blancos material with their current stock of centre-backs.
The thought of Azpilicueta leaving Chelsea may be unpleasant for fans but the reality is that he still hasn’t signed the dotted line of contract extensions.
This has allowed both Barcelona and Atlético Madrid to consider moves, with Mundo Deportivo naming Atleti as a sign of great interest in the Spaniard replacing Newcastle-bound Kieran Trippier.
Diego Simeone has been reported to be a big fan of Azpilicueta, with the Argentine believing he will fit perfectly into his style with the decision expected from the player in the coming days.
Barcelona are also rumored to be eyeing Danish defender Christensen.
A sign of potential for his future came when he signed up with new representatives KIN agency, which is run by Lionel Messi’s brother Rodrigo and reportedly has ties to Camp Nou.
Negotiations between the 25-year-old and Chelsea are said to have stalled before the conclusion of their deal.