Jose Mourinho has revealed that Iker Casillas "secretly" challenged his authority while the pair worked together at Real Madrid.
Casillas spoke bluntly about Mourinho's spell in charge of Los Blancos during a recent interview, five years on from the Portuguese tactician becoming the first coach to drop the goalkeeper.
A broken hand in January 2013 ruled the Spanish shot-stopper out for two months and the club acted by bringing in Diego Lopez from Sevilla – the Madrid youth product subsequently keeping his place even after Casillas returned to fitness.
Mourinho departed at the end of the 2012-13 season, though Casillas remained the second choice to Lopez during the first campaign under successor Carlo Ancelotti.
Casillas said he would take "the bull by the horns and confront Mourinho" if he could have his time again, but also insisted that he hopes to avoid being drawn into a dispute about the issue once again, so as not to "stain the values of Real Madrid".
However, the Manchester United manager thinks he instigated the conflict initially behind the scenes, with reports at the time suggesting it was the Spaniard leaking stories to the media.
"It seems like an interview with someone who is at the end of his career," Mourinho told Record.
"But when it comes to me when he says he has never confronted me, that is not the truth. He did it in a way that no one does better than him; secretly."
Mourinho is now plying his trade in the Premier League with Manchester United, while Casillas plays in the Primera Liga with FC Porto.