Eddie Newton has joined the Chelsea coaching staff for the rest of the season to assist Roberto Di Matteo.
The former Blues midfielder previously worked alongside Di Matteo at West Brom for 18 months before the pair were sacked in 2011.
He has now been reunited with the Italian, who has been placed in temporary charge of Chelsea until the summer following the departure of Andre Villas-Boas.
Fitness coach Jose Mario Rocha and chief opposition scout Daniel Sousa have left the club, having followed Villas-Boas from Porto last summer.
Newton's appointment comes a day after he told talkSPORT that Di Matteo must get the senior players behind him if the club are to have a successful end to the season.
He said: "Robbie will be trying to pull the senior players together and tell them the plans going forward. He will be trying to get a consensus and get everyone on the same page, pulling in the same direction and fighting for each other.
“At the moment Chelsea look like a bunch of talented individuals that are not playing together and he needs to get the team spirit back in the dressing room. The talent will then shine through on the pitch.
“He’s been there [at the club] and has perhaps seen things that weren’t going right and he might want to go in a different direction. He might want to change a few things and it bodes well for the immediate future.”