Idman.biz
Since Jose Mourinho left his post in 2007, no head coach has worked at "Chelsea" for more than 1000 days.
Idman.Biz reports this with reference to OneFootball.
Since 2007, Mourinho has also been the longest-serving at the London club, serving a second time from 2013 to 2015. The Portuguese coach led the "Blues" for 927 days. The top five also include Antonio Conte (741), Carlo Ancelotti (690), Thomas Tuchel (589) and Frank Lampard (571).
Enzo Maresca, Chelsea's most recent manager, has been in charge for 547 days. Under his leadership, the London team won the Conference League and the Club World Cup.
