If Jose Mourinho were to return to Stamford Bridge this summer, the Portuguese manager would certainly make some changes to the side.
In his first stint at the club, Mourinho orchestrated quite an overhaul in his first season, bringing in seven players and letting go of almost twice that amount in loans and free transfers.
Only Petr Cech and Paulo Ferreira remain from that group, but others like Didier Drogba and Ricardo Carvalho were extremely important to the side.
A similar overhaul may not occur, but Mourinho will bring in players he feels can return Chelsea to the top, both domestically and in Europe.
Some of them he's played with before, and others may have caught his eye in recent times. Some of the players on this list are speculative targets—not all these players have been linked with the side.
Here are five potential signings Jose Mourinho would make should he join Chelsea.
As is always the case with his new sides, Jose Mourinho would look to strengthen the defense.
The first team he'll look to raid for new talent is his former club, Real Madrid. Of all the defenders there, either Pepe or Raphael Varane would be his likeliest target.
The Portuguese destroyer would have seemingly been first in line, but Mourinho's comments about the player this week may have soured the relationship too much (via CNN).
Varane, meanwhile, has blossomed under Mourinho's tutelage. While he may be a difficult target to acquire, Mourinho may try to sign him.
Varane's arrival could mean a continued experiment for David Luiz in midfield, if that kind of thing interests Mourinho.
At the very least, he is one player who would be grateful for Mourinho's influence on his career, and he would provide the extra depth the club needs.
In an effort to continue his trend of bringing in at least one of his countrymen to a new club, Jose Mourinho may also look to sign Fabio Coentrao.
While he may have affection for Ashley Cole and their history together, Mourinho may look to the solid Coentrao to fill the left-back spot for his side.
Cole has one year remaining on his contract and it may come to a battle between Coentrao and Ryan Bertrand to replace him (via Sky Sports).
Alternatively, Coentrao has been used as a utility player for Madrid, and Mourinho could re-use him in that role at Chelsea.
One way to shut down a player who scored four goals against your side? Sign him up, of course.
According to Goal.com, Robert Lewandowski is one of the targets Jose Mourinho has in mind should he return to Chelsea.
Mourinho's most recent experience with Lewandowski may have left him with mixed feelings—part distaste for knocking out his side, and part admiration for how he did it.
Fernando Torres and possibly Demba Ba could get the boot, with Lewandowski and Romelu Lukaku charged with leading the line.
Sami Khedira completes the Real Madrid raid for Jose Mourinho.
The German midfielder is one of the few Real Madrid players who has been linked (via the Express) as a possible signing for Jose Mourinho at Chelsea.
Khedira has been one of Mourinho's constant first-team players during his time at Madrid, and is one of the few players who still has a decent relationship with him.
He would be a great option to fit into the midfield duo beside John Obi Mikel.
His ability to have a positive effect on both ends of the pitch is something Chelsea desperately requires in midfield.
Joao Moutinho may be another option for Chelsea, but the Blues will face a battle from Tottenham to sign him (via Express). That is, provided Spurs gets into the Champions League next season.
Fellaini has admitted his interest in joining Chelsea, according to Goal.com.
Real Madrid has been linked (via the Daily Mail) to the player in the past, and if those rumours were true, Jose Mourinho may carry that interest with him to Chelsea.