Vitesse Arnhem coach Peter Bosz is being linked with a move to Chelsea.
New interim Chelsea manager Guus Hiddink needs to build up his backroom team after Jose Mourinho's staff followed him out the door.
Steve Holland will be staying, but Hiddink could turn to his homeland to add to his dugout.
Former Blues midfielder Bolo Zenden is a prime candidate and has expressed interest in taking on a role.
And Bosz is also on the radar, with Vitesse enjoying close ties with Chelsea and the head coach making a good impression on Blues directors.