The moment Mourinho returned there was talk that he would usher David Luiz out the door. Why on earth he would want to move on one of Chelsea's best and most loved players is unclear. However, there are some valid reasons why the future of another popular (among Chelsea fans at least) centre-back has come into question. John Terry isn't getting any younger and with uncertainty at the back, a new central defender is among Mourinho's priorities. The player most consistently linked with the Bridge is Mangala. Mourinho was reportedly tracking the 22-year-old Frenchman while at Real Madrid and hasn't lost his interest. It's thought his club Porto will demand £30m for him.
Another option at centre-back is Mangala's fellow Frenchman Rami. The 27-year-old is reportedly unhappy at Valencia and Chelsea are ready to step in. Should they do so, they can expect competition from Manchester City for his signature.
Just about every side in the Premier League has been linked with Shaw. Why? Because the 17-year-old looks like the best up-and-coming English left back and having been produced by Southampton - the developers of Theo Walcott and Gareth Bale - there's an added hint of promise about his future. It's understood he is content to remain on the south coast for another season, however, a bidding war could force Southampton to cash in.
Another transfer window, another load of rumours about the future of Sneijder. The Netherlands international finally left Inter Milan in January after a prolonged parting of the ways in Italy. But with a World Cup around the corner, does the 29-year-old play-maker really want to be plying his trade in Turkey with Galatasaray?
Another player who finds himself regularly linked with a move is big-haired Fellaini. After his best season for Everton and the departure of David Moyes, now seems like an ideal breaking point for his time at Goodison Park. The powerful, goal-scoring Belgian midfielder has been linked with all the top teams but his forceful style perhaps moulds with the ethos of Jose Mourinho better than any of the other options.
As soon as it emerged that Mourinho was on his way back, stories emerged that suggested he might be bringing Alonso with him. The Spain international was one of Mourinho's few allies in the latter stages of Mourinho's time at the Bernabeu. His class is unquestionable, and his five years at Liverpool ensure he can do the business in the Premier League. The latest reports suggest talks over a new deal at Real Madrid have stalled.
Another Real Madrid player who could follow Mourinho to Chelsea is Modric. He is also another player with proven Premier League pedigree. After moving to Spain from Tottenham last summer, the Croatian has struggled to impose himself on the team and in a Spanish newspaper poll, was voted the worst signing of the summer. Just a year before that, he was among the most revered players in England. Reports suggest he would be open to a return to the league where he shone most.
Marco van Ginkel
Ajax were showing interest in the Netherlands Under-21 midfielder van Ginkel. But then they admitted defeat when Chelsea arrived on the scene. The 20-year-old's current club Vitesse Arnhem are understood to be ready to sell for a fee in the region of £8m. Last season, during which he earned his first senior cap, he won the 'Dutch Talent of the Year' award.
As with most clubs, Chelsea find themselves linked with strikers more than any other types of player. That may seem strange considering they have £50m acquisition Fernando Torres, January signing Demba Ba and one of the 'loanees of last season' Romelu Lukaku at their disposal. Yet rumour has it Torres isn't the man to lead the line for Mourinho and he wants a new No 9. Cavani is considered among the leading talents in Europe and after much rumour about his future, it appears the Uruguay international could finally leave Napoli. The player himself has spoken of his interest in working with Mourinho although favours a move to Real Madrid according to his father.
He's blitzed the Eredivisie, Serie A, La Liga and last season, Ligue 1. So is it time for Ibrahimovic to give it a go in the Premier League? If there's one thing we know about the former Malmo, Ajax, Juventus, Inter Milan, Barcelona, AC Milan and now PSG striker, it's that he doesn't mind moving clubs. There are suggestions he's had enough of life in Paris and Chelsea are reportedly keen to lure him to London.
A move for Ibrahimovic would certainly put a sparkle on the back pages, but should Chelsea do a deal for Wayne Rooney it'd be on the front as well. Everyone knows the England striker is unhappy at Manchester United, so much so he asked Sir Alex Ferguson for a transfer shortly before the end of the season. His feelings now David Moyes has taken over are unknown, but with just two years remaining on his deal, it's thought something will give this summer. Arsenal are also keen on Rooney, but if they or Chelsea are to succeed in signing the 27-year-old, they will have to overcome United's policy of refusing to sell their best players to their direct rivals.
With a year to run on his Borussia Dortmund contract, the future of Lewandowski is one of the stories of the summer. His current club are not interested in selling to Manchester United or Bayern Munich apparently, and would rather keep the Poland international for another season and let him leave for free next summer. A bumper offer from Chelsea could convince the beaten Champions League finalists to let him go 12 months early.
Mourinho loves a big powerful striker - as shown by his immediate purchase of Didier Drogba during his first spell at Chelsea. Aston Villa hitman Benteke would fit the mould perfectly. However, after an incredible first season in the Premier League which yielded 19 league goals, Villa are understandably reluctant to let him go. The fact every other side in the Premier League and on the continent would love to sign the 22-year-old could also mean a hugely inflated price tag.
Talking of huge price-tags, Brazil international Hulk has been linked with Chelsea. His current club Zenit St Petersberg paid Porto a reported £50m for him in 2012, and should Chelsea firm up their interest, they could expect to pay something in that region again. The powerful 26-year-old will be more than aware that a World Cup in his home nation is looming. Impressing in the Premier League would surely be a better signal of his talents than scoring goals in Russia.
Chelsea are reportedly 'close' to agreeing a deal for Fiorentina forward Stevan Jovetic. The 23-year-old Montenegro international is among the most exciting talents in Europe. That his current club have brought in Giuseppe Rossi seems to suggest they are ready to let Jovetic leave. If they sanction a deal, they could expect to find £25m in their bank account the following day.
Following the return of Jose Mourinho, Chelsea fans are now expecting a flood of players to follow him through the entrance at Stamford Bridge as the 'Special One' puts his mark on the team once again.
There's already an abundance of talent in west London, however it's understood there could be a few high profile exits this summer, meaning spaces will need filling.
Here, we round up those rumoured to be on their way to Chelsea during the current transfer window.