But will the arrival of the Portuguese tactician spell the end of some Chelsea players' careers who were making progress under Benitez?
Could it mark yet another shift in how Chelsea will operate in both the transfer market and on the pitch?
The club has been renowned for bringing in young talent with both Eden Hazard and Oscar arriving from Lille and Internacional, respectively, last summer. As a result, the senior management has been tasked with eradicating the dead wood from Stamford Bridge as Chelsea finalize their transition period.
Here, we take a look at some of the current playing squad who could find their days numbered at Stamford Bridge.