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Mauricio Pochettino was expected to be the man to turn the Blues' fortunes around, and was backed heavily in the summer by owner Todd Boehly, but his team are still struggling to string positive results together, and they dropped to 12th after losing 2-0 to Everton on Sunday.
It was Chelsea's seventh defeat of the season, a dire return for a club that has spent £1bn over the last three transfer windows, but Pochettino still wants to bring new players through the door next month.
Boehly has not been afraid to splash the cash in his first 18 months at Stamford Bridge, but it has not had the desired effect, with very few players living up to expectations.
Mail Sport has ranked Chelsea's signings under the American owner on a scale from 1-10, with their miserable run showing no signs of ending any time soon.
Chelsea owner Todd Boehly has spent £1bn on players in his first 18 months at the club
Chelsea have struggled with discipline and have lost seven of their 16 league games this term
Sterling was the first signing of the Boehly era when he joined in July 2022, and plenty was expected of the £50m man after he won four Premier League titles at Manchester City.
But his first season was a disappointment as he scored just six league goals, failing to hit the heights that he did at the Etihad Stadium.
There have been signs of improvement this term, and he already has five goals to his name, but he has still blown hot and cold at times and continues to be overlooked for England by manager Gareth Southgate.
He can be considered one of Chelsea's better signings - but that's not saying much - and the 29-year-old still has more work to do if he wants to get on the plane for Euro 2024 next summer.
Rating - 5/10Kalidou Koulibaly
Koulibaly had been widely recognised one of Europe's best defenders for a number of years, but signing a 31-year-old for £34m on a four-year deal always appeared a risk. It didn't pay off.
The Senegalese centre back never settled in England following his move from Napoli, looking clumsy on the ball and half a yard slower than when he was at his brilliant best.
Chelsea persisted with him throughout last season, but he never looked like finding his best form, and they had little option but to move him on in the summer as he joined Saudi Arabian outfit Al-Hilal.
Chelsea signed Koulibaly years too late, and did not get value for money at all.
Rating - 2/10
Kalidou Koulibaly had a season to forget at Chelsea before being offloaded in the summer
Signed as a bright young hope from Aston Villa last summer, Chukwuemeka was largely ignored by Thomas Tuchel, Graham Potter and Frank Lampard in 2022-23.
Yet he still put club ahead of country by pulling out of the group stages of the Under-20 World Cup to help Chelsea during an injury crisis earlier this year.
In return, he made two substitute appearances and started in a 4-1 defeat against Manchester United.
Things appeared to be on the up for him at the start of this season as he started both of Chelsea's first two matches, scoring in the latter at West Ham. But he limped out of that match with a knee injury and is yet to return from that setback. He is still only 20 so has time on his side, but he hasn't delivered on his promise so far.
Rating - 4/10Marc Cucurella
Cucurella looked a serious player in his only season at Brighton, and Chelsea stumped up £62m to land him after Manchester City pulled out of the race for his signature.
He also got the chance to play under Graham Potter again when the manager arrived in west London barely a month later after also being enticed away from Brighton.
But it just hasn't worked. Cucurella has had his defensive qualities consistently questioned, and is perhaps only still at the club to cover for Ben Chilwell, who can't seem to stay fit.
Pochettino has bizarrely played Cucurella as a right back in recent matches, and he has continued to look lost on the pitch. Must be moving towards last-chance saloon territory at Chelsea.
Rating - 3/10
Marc Cucurella has not looked the same player at Chelsea as he was at Brighton
Is it wise to spend £70m on a player after they've only just returned from a broken leg? Probably not, but Chelsea did it anyway.
Fofana then injured his knee within weeks of joining Chelsea and missed the majority of last season.
He tore his ACL over the summer, and is not due to be available again until the latter stages of this season.
He has had rotten luck over the last two years and it would be wrong to mark him too harshly, but there must be doubts over whether he will ever be the same player again after a number of heartbreaking setbacks, and Chelsea may regret making him the most expensive defender in their history.
Rating - 4/10Pierre-Emerick Aubameyang
Aubayemang joining Chelsea on loan at the end of last year's summer transfer window looked to be a shrewd move at first. Bringing in the former Arsenal man to work under Tuchel - a manager he previously thrived under at Borussia Dortmund - appeared smart business.
Boehly then proceeded to sack Tuchel the following week.
Potter didn't fancy Aubameyang at all, and the Gabonese forward was frozen out of the squad for the majority of the second half of the campaign, having been left off the Champions League squad list for the knockout stages.
Aubameyang finished with three goals in 21 appearances, which now looks even worse as he is currently flourishing at Marseille.
Rating - 2/10
Pierre-Emerick Aubameyang was frozen out for the majority of last season at Chelsea
Zakaria arrived on loan from Juventus as somewhat of an unknown quantity.
After hardly playing in the first half of the season, he had fans raving about him and even calling for him to be signed permanently when he delivered an impressive performance against City in January.
That proved to be the only high point of his stay, though. He was restricted to just 11 appearances in all competitions, scoring only once.
Juventus don't appear convinced by him either, and loaned him out to Monaco this season.
Rating - 2/10David Datro Fofana
The Ivorian striker was Chelsea's first January signing last season, but he is clearly just a player for the future.
The 20-year-old featured just four times in the second half of the campaign before being loaned out to Union Berlin in the summer.
May be able to force his way into the club's plans at some point, especially as their goalscoring problems have persisted this season, but he is some way down the pecking order for now.
Rating - 3/10Benoit Badiashile
Badiashile was one of Chelsea's better performers as the wheels came off in the second half of last season, and the 22-year-old looks to have a bright future.
A hamstring injury kept him out for the opening months of the current campaign, but he is now back and has slotted into Pochettino's preferred starting XI.
Thiago Silva remains the senior figure at the back for Chelsea, but Badiashile may need to step up if the Brazilian leaves in the coming months.
He looks capable of being the leader of the defence in years to come, but Chelsea must find a long-term option to play alongside him.
Rating - 6/10
Benoit Badiashile has been one of Chelsea's better signings under Boehly
Felix was brought in to solve Chelsea's goalscoring issues, but got sent off in his first game against Fulham and immediately had to serve a three-match suspension.
The Portuguese star is undoubtedly talented, but he flattered to deceive during his short stay in London, scoring four goals in 20 matches.
Chelsea will have expected more given that they paid a £9m loan fee to get him from Atletico Madrid, and they decided not to push to sign him permanently in the summer.
He has since gone on loan to Barcelona and is playing well, with club president Joan Laporta keen to keep him beyond this season.
Rating - 4/10Mykhailo Mudryk
Chelsea pipped Arsenal to the signing of Mudryk having been happy to splash out £88m on the Ukrainian winger. Arsenal went on to sign Leandro Trossard instead, and have clearly got the better side of the deal.