David Luiz was left upset that former Chelsea manager Andre Villas-Boas was not offered more time at Stamford Bridge.
Roman Abramovich last summer paid £13.3million (€15m) to get the former Porto boss, but sacked him at the beginning of March.
The consensus is that Villas-Boas lost his job because Chelsea were not, and are not, certain of finishing in the top four of the Premier League.
Roberto Di Matteo has been placed in interim charge and has a 100 per cent record in his three games, which included Wednesday's European epic against Napoli.
But Luiz still thinks Villas-Boas should have been given longer than eight months, as the defender told Brazilian TV before the game with Napoli: "I'm really sad, as Andre was a really capable professional.
"Unfortunately, he didn't have the time to show his true value at Chelsea.
"He didn't have the chance. You cannot doubt a professional like him, who won five titles last season and was feted by everyone. But he didn't have enough time at Chelsea."
Next up for Chelsea is Sunday's FA Cup quarter-final against Leicester at Stamford Bridge and Luiz is determined to face the Championship club.
He could barely walk following the thrilling 4-1 extra-time win over Napoli, having played the full 120 minutes of the UEFA Champions League last-16 second-leg clash.
But he said: "It's my ankle. I hurt it when I got a kick, but that's normal. This is football. I'll go to the training ground for treatment to help me for Sunday. I want to play."
Chelsea could make wholesale changes after their midweek exertions, including resting captain John Terry, who failed to complete the Napoli match.
That was only the 31-year-old's second game back following his remarkable recovery from knee surgery, but his leadership qualities have already shone through.
Luiz said: "For Chelsea, it is important to have all the players back from injury.
"JT is the captain and a legend for the club. He is a fantastic player and of course it makes me happy when he plays."
What will be the outcome in the match Chelsea vs Leicester?