The 38-year-old won two Premier League titles, the Champions League, two FA Cups and two Europa Leagues wit the Blues, turning out 290 times for them.
He played under a string of managers, including Antonio Conte, Andre Villas-Boas and Roberto Di Matteo, but Mourinho stood out, especially for a memorable mind game.
Cahillâs centre-back partner John Terry has recalled a story of when Mourinho told them to âf**k offâ and he would sign Raphael Varane and another defender to place them.
Asked for his memories of the event, Cahill told The Obi One podcast: âI was taken aback. I was shocked by it, to be fair it p***ed me off massively.
âBut you know what, that was him though wasnât it? The mind games, he was clever with stuff like that.
âHe knew heâd get a reaction, especially off the character of me and John, he knew that he would get a reaction and he did. I was fuming.â
Terry had given his side of the story on the same podcast, explaining: âWe did this possession game where me and Gaz played the ball into midfield. Thereâs no space to play it into midfield but you have to go through midfield to get into the other third.
âMe and Gaz are feeding it, itâs getting intercepted, weâre conceding goals and heâs stopped the session. Iâm captain, Gaz is vice-captain and he says, âSee you two, you can f*** off.â
âIâll go and sign Varane and Iâll sign another top defender in the world and spend ÂŁ100m and you two can sit on the bench and watch them. Me and Gaz were like, âf***ing hell we won the league last year!â
âWe couldnât believe it. Me and Gaz looked at each other and said, âRight, game onâ.â
Late in his Chelsea career Cahill would be managed by Sarri, who he does not have fond memories of at all as he was out of the team and very confused by his approach.
âIt was all tactical. What was Sarriball? I played it and I still donât know what it is,â Cahill said.
âHe didnât play me so â it was very standstill. He was a very superstitious manager. We would practice a centre, the ball being played back to the centre-back who would put a foot on it, and smash a diagonal.
âThe restart of a game for example. Weâd do that every Friday. Youâre talking full on international players. That only needs one session, doesnât it? It blew my mind.â
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