Ghana defender Baba Rahman trained for the first time under new Chelsea coach Guus Hiddink on Tuesday.
Hiddink was appointed at the weekend and was in the stands when the Blues beat Sunderland 3-1 at Stamford Bridge.
But Baba Rahman was an unused substitute.
The Dutchman will take temporary charge of the Blues — until the end of the season — as the Stamford Bridge club line up a long-term successor to the sacked Mourinho.