The 52-year-old took over for the second time in 2011, but has had a torrid couple of months losing nine of their 16 league games so far.
While he has secured qualification to the next round of the Champions League, Chelsea's worrying league form has been the catalyst for change.
Pep Guardiola, Guus Hiddink, Brendan Rodgers and Juande Ramos have all been linked with a move in the opposite direction.