I spied the Italian this afternoon walking off the pitch and down the tunnel into the changing room.
Ancelotti sped off to Italy on Thursday morning to be with his ill father.
Ray Wilkins took charge of the pre-match press conference yesterday and suggested that he could take the team today against Blackburn Rovers.
But Ancelotti is back and will take his place on the bench.
Blackburn are making four changes from their last match while the Blues are without Zhirkov, Bosingwa and Mikel for the 5.30pm encounter.
Wilkins took charge of the Blues last season for the FA Cup tie at Watford and won the game.
He would have being looking forward to extending that run but Ancelotti's ultra professionalism has put the boot into that notion.