Koeman was furious with media claims of the players complaining to him about his system and also his man-management.
"Last week an article appeared about the system, which the players wanted to play in a different way. That's not true, that's a lie," Koeman emphasised on Saturday, the day before the home game with Levante.
“I talk to my players every day and they haven't said anything about my system. Nor about what I should and should not say at my press conferences."
With this last comment, Koeman referred to the report that his open criticism of some players would have caused a bad working relationship.
“I always try to respect my players. But we have reached a level at Barcelona that it must be said when a mistake is made. I have not killed any player. When I say something about a player, I have already discussed it with him in advance."
He added: “Whether I feel the confidence of my players? Yes, otherwise I wouldn't be able to work here."