One of the worst modern examples of a player-manager fall-out is forever immortalised in Zlatan Ibrahimovic's biography - I Am Zlatan.
Ibrahimovic makes no secret of his affection for a player's manager like Jose Mourinho and his distaste for then-Barcelona boss Pep Guardiola who, to paraphrase Zlatan, played him out of position or pandered to the requests of Lionel Messi, even if it was to the detriment of their star signing the previous summer. At Camp Nou, Ibrahimovic was not himself - and he seemingly blames one man; Guardiola.
The Spaniard has since moved on. He won La Liga thrice and the Champions League twice as manager of the Catalans and is now enjoying success at Bayern Munich, winning the German championship in record time.
According to a report in Bild, though, his relationship with one of his players has deteriorated to such an extent that it is reminiscent of Ibrahimovic's experience with the man he branded an "idiot", Pep.
There is "misunderstanding" between the two, Bild claims. Mandzukic has "refused to shake hands" with Guardiola, he "was angry", there is an obvious "dislike" for the coach and it is having a detrimental impact on the rest of the Bayern squad. Bild conclude: "The striker has no future at Bayern".
Of course, his replacement has already been acquired, as the club ratified the transfer of Borussia Dortmund hotshot Robert Lewandowski earlier in the year.
All that is left is to negotiate the exit of Mandzukic.
Both Arsenal and Manchester United have been linked with the player before, as the Gunners turned to Mandzukic after it became apparent they were losing the race to sign Diego Costa to Chelsea. And Louis van Gaal was even alleged to make Mandzukic his first signing as boss of the Old Trafford outfit.
For a proven goalscorer (18 goals and six assists from 30 Bundesliga appearances - one goal/assist every 84 minutes), Mandzukic has a rather modest price-tag of £26.4 million; but will one of the Premier League duo take the punt?