Claudio Ranieri has said his "dream died" when Leicester sacked him.
The Italian led the Foxes to last season's Premier League title, but on Thursday he lost his job.
In a statement, he said: "Yesterday, my dream died. After the euphoria of last season and being crowned Premier League Champions all I dreamt of was staying with Leicester City, the club I love, for always. Sadly this was not to be."
Jose Mourinho said Claudio Ranieri's sacking by Leicester within months of winning the Premier League title was symptomatic of "the new football".
Ranieri was dismissed on Thursday night with the Foxes just one point above the relegation zone, having only secured an incredible and improbable championship in May.
Mourinho experienced similar treatment at Chelsea. He led the London club to the 2014-15 title, but was dismissed in December 2015 after a series of dreadful results and what was described as "palpable discord" with his players by technical director Michael Emenalo.
The Portuguese, who succeeded Ranieri at Stamford Bridge when his first spell at the club began in 2004, clearly sees the Italian's exit as further proof of how ruthless football has become at the highest level.
He posted a picture of himself and Ranieri smiling, and wrote on Instagram: "Champion of England and FIFA manager of the year. Sacked. That's the new football. Keep smiling amico. Nobody can delete the history you wrote."
Leicester winger Marc Albrighton has denied he had any part in Claudio Ranieri's sacking
Jamie Vardy has joined Kasper Schmeichel in denying any involvement in Claudio Ranieri's sacking as Leicester City boss
Leicester City interim manager Craig Shakespeare has said the club will have "utmost respect" for former manager Claudio Ranieri.