Justin Langer reportedly told Cricket Australia that he was quitting as head coach due to a lack of support from senior players, support staff and the board.
Langer resigned with immediate effect on Saturday and, in a copy of his resignation letter obtained by The Australian, he explains why he decided to reject the offer of a short-term contract extension.
In the letter, which was reportedly sent to Cricket Australia CEO Nick Hockley, Langer said he felt it was "in everyone's best interests" for him to walk away and apologised if he came across as "too intense".