Consistency in the dugout is something that has been painfully absent from Roman Abramovich's enormous success at Chelsea.
In his nearly 18 years owning the club, the Russian has employed 10 permanent managers - with Jose Mourinho completing two spells - and could be about to sack another as Frank Lampard's job looks increasingly under threat after his side slumped to ninth in the Premier League following a run of just one win in six games.
Some big names have come and gone. Carlo Ancelotti, Antonio Conte and Mourinho are all managerial greats but Abramovich has never been afraid to wield the axe if Chelsea aren't performing to his liking.
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Frank Lampard's future as Chelsea manager is hanging by a thread after another defeat - owner Roman Abramovich has never been afraid to sack a manager during his time in charge
Claudio Ranieri was the first to get the chop, replaced by Mourinho as Abramovich sought a manager who could put his billions to good use in the transfer market and create a winning team.
Avram Grant, Maurizio Sarri, Roberto Di Matteo and Andre Villas-Boas have all also been offered, but eventually denied, the chance to build a long-term project in west London.
Some have won Premier League titles but been sacked months later. Di Matteo won the club's one and only Champions League in remarkable fashion but still found himself unemployed six months later.
What is most concerning for Lampard's employment prospects, however, is that he boasts the worst points-per-game record in the Premier League of all Abramovich's managers with 1.67.
Grant boasts the best with 2.31 with Mourinho (2.19), Conte and Ancelotti (both 2.14) completing the top three.
In fact Lampard's record is worse than that of Villas-Boas, who was brutally sacked after just 27 league games in charge.
Lampard knows how the ruthless club works and, after the painful 3-1 home defeat by Manchester City, said: 'I had days like this and lifted a trophy at the end of the year'. That also often ended with the manager gone.
His struggling side face League Two Morecambe at Stamford Bridge on Sunday, and the Chelsea icon will be well aware that defeat to the unfancied side would be an embarrassment like no other - and could be the final nail in the coffin.
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Chelsea forward Timo Werner shows the strain of his and the team's recent dismal run
Claudio Ranieri - sacked May 2004
The writing was always on the wall for Ranieri when Abramovich took control of the club, despite having steered them into the Champions League in 2002-03.
Abramovich began to want more returns from his significant investment in the transfer market upon his arrival.
Ranieri bought in the likes of Damien Duff, Juan Sebastian Veron, Hernan Crespo, Joe Cole and Claude Makelele, leading Chelsea to second in 2003-04 and the semi-finals of the Champions League.
But Ranieri was not the man to lead them into their new era and Abramovich sacked him at the end of the 2003-04 season, replacing him with Mourinho.
The Italian, who went on to win the Premier League with Leicester, set the framework for much of Chelsea's success under Mourinho.
He bought a number of crucial players and and afforded John Terry and Lampard their big breaks in the first team.
Claudio Ranieri was the first manager sacked by Abramovich, leaving in the summer of 2004
Jose Mourinho - sacked September 2007 and December 2015
The 'Special One' arrived in west London with a reputation as a winner thanks to his phenomenal success at Porto and made an immediate impact at Stamford Bridge with more big-money signings.
Mourinho won the Premier League and League Cup in his first season but missed out on a place in the Champions League final thanks to Luis Garcia's 'ghost goal' at Anfield.
Chelsea retained the league title in 2005-06 but the following campaign saw tensions boil over between the manager and the owner amid a power struggle with sporting director Frank Arnesen and Abramovich adviser Piet de Visser.
Jose Mourinho delivered successive Premier League titles but was sacked after three years
Andriy Shevchenko arrived in the summer of 2006 but Mourinho wanted to continue with Didier Drogba up front and left the Ukrainian out of his squad completely at times, which irked the owner.
He was eventually let go after a poor start to the 2007-08 campaign following years of backroom squabbling.
Mourinho left with six trophies in three years but would return to the Bridge eventually.
After success coaching Inter Milan and Real Madrid in between, Mourinho made his long-awaited comeback to the Premier League with Chelsea in the summer of 2013.
His first season back was the start of a rebuilding process before he carried out more excellent moves in the transfer market in 2014, signing Thibaut Courtois, Cesc Fabregas and Diego Costa, to give him a squad he could compete with.
Mourinho regained the Premier League in his second spell before a disastrous start to 2015-16
Sure enough Mourinho led Chelsea back to the title in 2014-15 with three matches to spare but European success continued to elude them as they were knocked out in the Champions League last-16.
Mourinho signed a new four-year contract in August 2015 but a horror start to the season, in which Chelsea lost nine of their 16 matches, saw him sacked by Abramovich again.
In a statement, Chelsea said: 'The club wishes to make clear Jose leaves us on good terms and will always remain a much-loved, respected and significant figure at Chelsea.'
Avram Grant - sacked May 2008
The Israeli was drafted in as the club's director of football in July 2007 but then stepped in to replace Mourinho during the 2007-08 season.
Considering he was inexperienced at coaching elite clubs, Grant hit the ground running amid protests from fans that Mourinho had been shown the door. The Blues embarked on a 16-match unbeaten run and Grant signed a four-year contract in December 2007.
He was beaten by Tottenham in the League Cup final and was knocked out of the FA Cup by Barnsley but Chelsea rallied to finish second in the league.
Going one step further than Mourinho, Grant led the team to the 2008 Champions League final in Moscow after beating Liverpool in the semi-finals.
But Terry's slip and penalty miss cost them dearly against Manchester United and Grant was apparently left feeling 'betrayed, upset and angry' following his sacking, just days after his side lost in Russia, after eight months in charge.
It was said, however, that Chelsea's senior players had never rated Grant's management, and instead effectively took over the running of the team themselves.
Avram Grant led Chelsea to the 2008