The move marks a return to Stamford Bridge for Frank who enjoyed an illustrious playing career with the Blues.
Bruno Saltor will take charge of the team as Interim Head Coach.
Laurence Stewart arrives from Monaco to become Chelsea’s technical director to focus on global football.
The dismissal ended Thierry Laurent’s 17 years at Stamford Bridge.
It was reported in British media that Mr Willoughby had been sending the messages to a football finance agent Catalina Kim from last year.
Brighton has permitted Chelsea to talk to Graham Potter.
The pacy English striker brings more fire power to Thomas Tuchel’s side that has endured patches of goal droughts from its forwards.
Cech, 40, a former Chelsea goalkeeper, returned to Stamford Bridge as an official in 2019.
Chelsea announced on Saturday morning that a group led by Todd Boehly had agreed to buy the club.
The sale is expected to complete in late May subject to all necessary regulatory approvals.
