Andre Villas-Boas was sacked by Chelsea on Sunday after less than a season in charge and on the back of several disappointing results and performances.
Here, Sky Sports takes a look at five matches which may have played a key part in Villas-Boas' departure.
October 29, Chelsea 3 Arsenal 5
Defensive frailties haunted Villas-Boas during his time at Stamford Bridge and nowhere was that more obvious than in their loss to Arsenal. Twice Chelsea led but the Gunners were not to be denied and secured all three points with two Robin van Persie goals in the final five minutes.
December 31, Chelsea 1 Aston Villa 3
It was a far from happy New Year for Villas-Boas, with this home humbling at the hands of Aston Villa making it three points from four games. Again two late goals were Chelsea's undoing as Stephen Ireland inspired Villa to a shock win and the hosts left the pitch to a chorus of boos.
February 11, Everton 2 Chelsea 0
Chelsea dropped even further behind their rivals with an insipid display at Goodison Park marked by defensive sloppiness. Steven Pienaar gave Everton the lead early on and the points were sealed by Denis Stracqualursi to extend Chelsea's winless streak in the league to four matches.
February 21, Napoli 3 Chelsea 1
With hopes of Premier League glory long gone, the Champions League represented Villas-Boas' best hope of proving he was up to the job. But Napoli's strike partnership of Ezequiel Lavezzi and Edinson Cavani proved far too good for the Blues and left them a mountain to climb in the second leg.
March 3, West Brom 1 Chelsea 0
The final straw for Chelsea owner Roman Abramovich was a display in defeat by West Brom that even Villas-Boas could find little positive in. Frank Lampard was restored to the starting line-up but again Chelsea offered little attacking threat and Gareth McAuley scored the only goal of the game late on.
Who should be the next Chelsea manager?
Roberto Di Matteo